Hazards and Disaster Risk

Source: Understanding Flood Vulnerability: A Case Study of Harris County (StoryMap)

Climate change disproportionately affects the poor and socially vulnerable. The scientific community is responding in its commitment to data and services development that can advance environmental justice. A recent NASA Earthdata Backgrounder profiles some of the work the NASA Socioeconomic Data and Application Center (SEDAC) is doing in this area.

The backgrounder describes a research project focused on the low-wealth, predominately Black community of the Hampton Roads region of Norfolk, VA, which is experiencing rising sea level rise in part because the land area is sinking. SEDAC population data was paired with satellite data to reveal high population density combined with anomalously high sea surface height in this area, identifying high vulnerability. Integrating different types of data in this way lets planners and policymakers make better-informed mitigation decisions that take into consideration social as well as physical impacts of sea-level rise, better insuring environmental justice for vulnerable communities.

In a second example, in collaboration with the International Research Institute for Climate and Society (IRI), SEDAC helped develop an index that assesses flood vulnerability for Harris County, Texas. Taking a multidisciplinary approach to capturing resilience and susceptibility to flooding, 15 indicators were combined into an aggregate index. The tool can visualize flood vulnerability at the block group level for Harris County and analyze relative flood vulnerability across the region, improving prioritization of flood remediation policies and aid.

CIESIN director Robert Chen, with associate director for Science Applications Alex de Sherbinin and research scientist Susana Adamo, helped organize and co-lead a NASA Equity and Environmental Justice virtual workshop, in their respective SEDAC roles as manager, deputy manager, and project scientist. The workshop report was released in December 2021.

SEDAC manager Robert Chen, with deputy manager Alex de Sherbinin and project scientist Susana Adamo, helped organize and co-lead the NASA Equity and Environmental Justice virtual workshop held October 20, 2021. NASA Earth Science Division (ESD) director Karen St. Germain opened the event, which brought together 15 invited experts, including SEDAC User Working Group (UWG) chair Barbara Ryan and several other UWG members, ESD staff, and representatives from social science research organizations who engage with environmental justice (EJ) research and communities. Chen, de Sherbinin, and Adamo co-led several breakout groups, working closely with SEDAC program scientist Nancy Searby and other NASA staff. The workshop report is now available.

In early 2021, a Biden administration executive order on equity directed all federal agencies to incorporate achieving environmental justice in their missions. In June 2021, NASA launched Mission Equity, a comprehensive effort to assess expansion and modification of agency programs, procurements, grants, and policies, and examine potential barriers and challenges for historically underrepresented and underserved communities.

Tuholske et al., PNAS, 2021 Annual municipality-level increases in the rate of urban population exposure to extreme heat, 1983–2016.

Rising air temperatures associated with climate change are a threat to cities throughout the world, but especially to the urban poor. The poor generally have fewer adaptive resources and less protective shelter; they have greater health vulnerability to extreme heat, and lower ability to evacuate. These conditions can be exacerbated by the urban heat island effect, where closely spaced structures with lots of pavement and limited green space, common to poorer neighborhoods worldwide, retain heat more readily and for a longer duration. Better understanding of patterns of local exposure to extreme heat is critically needed to design adaptive measures and improve health outcomes. However, until now, global, fine-resolution data on the intersection of extreme heat and population distribution in urban settings have been limited.

A new study published in the prestigious journal, Proceedings of the National Academy of Sciences (PNAS), “Global Urban Population Exposure to Extreme Heat,” is the first to combine temperature, relative humidity, and population data to provide a more detailed and comprehensive view of how extreme heat exposure is likely to impact many more people in cities around the world in the coming decades. Lead author is Earth Institute Fellow Cascade Tuholske, based at CIESIN, with co-authors Kelly Caylor, Chris Funk, Andrew Verdin, Stuart Sweeney, Kathryn Grace, Pete Peterson, and Tom Evans. The team used new, fine-resolution temperature, relative humidity, and population data to assess urban extreme heat exposure in more than thirteen thousand cities, from 1983 to 2016. Using a daily maximum wet bulb globe temperature threshold of 30°C (86°F)—which accounts for a combined impact of both temperature and humidity on human health and wellbeing—global exposure was seen to increase nearly 200% from 1983 to 2016. Total urban warming elevated the annual increase in exposure by approximately 50% compared to urban population growth alone. Exposure increased for nearly half of urban settlements worldwide, which in 2016 comprised 1.7 billion people.

The authors also found that how total urban warming and population growth drove the trajectory of exposures was not evenly distributed, thus reinforcing the importance of crafting adaptation measures that address local needs. Their findings further suggest that previous research has underestimated extreme heat exposure, underscoring the necessity for improved data to support the development of targeted adaptions such as early warning systems to reduce harmful effects, especially on the urban poor. Visualize the Data/Associated Press  

This summer has seen a spate of extreme climate-related events, from record high temperatures to forest fires, floods, and severe storms. Climate and other natural and manmade hazards do not affect all populations equally. Some sub-populations are particularly vulnerable to their effects owing to factors such as low income, lower levels of education, poor housing, or historical inequalities. Parsing out the fine-grained layers of social conditions across the strata of society—how much money people make, who makes up their households, minority status, ability to understand English, dwelling places, and access to transport—can provide the fundamental elements needed to quantify social vulnerability to hazards in the United States. The Centers for Disease Control (CDC) Social Vulnerability Index (SVI), created by the Geospatial Research, Analysis, and Services Program (GRASP) of the Centers for Disease Control and Prevention (CDC) and the Agency for Toxic Substances and Disease Registry (ATSDR), has long been a key resource for local officials to identify communities that may need support before, during, or after hazardous events or disease outbreaks.

To increase the utility of the SVI data set, the NASA Socioeconomic Data and Applications Center (SEDAC) operated by CIESIN gridded the input data and removed uninhabited areas. The resulting data set, the U.S. Social Vulnerability Index (SVI) Grids, enables calculation of the SVI for user-defined areas, facilitating integration with hazard and other geospatial data. The gridded SVI data set uses the same four themes as the CDC/ATSDR index—Socioeconomic, Household Composition and Disability, Minority Status and Language, and Housing Type and Transportation—to rank communities on vulnerability for the entire United States. The SVI data set is based on inputs at the census-tract level for 15 variables for the years 2000, 2010, 2014, 2016, and 2018, and aligns with the Gridded Population of the World (GPW) data set, SEDAC′s flagship data collection.

A map gallery includes an overall SVI map and four maps visualizing each of the themes. Development of the gridded data set and maps was led by Carolynne Hultquist, post-doctoral research scientist at CIESIN.

CIESIN scientists remain active in a number of different scientific communities, despite travel restrictions due to the COVID-19 pandemic. On April 27, at the virtual meeting of the European Geophysical Union, Martin Juckes, co-manager of the Intergovernmental Panel on Climate Change (IPCC) Data Distribution Center (DDC), presented a lightning presentation and poster paper, “IPCC Data Distribution Centre: FAIR Data from Climate Research to Mitigation Policy.” Robert Chen and information scientist Xiaoshi Xing were co-authors. CIESIN is one of four organizations that jointly operate DDC; the other three are based in the UK, Germany, and Spain. The IPCC DDC provides access to key data sets used in IPCC assessments and reports. Also participating was Robert Downs, CIESIN senior digital archivist, who co-authored the presentation, “Towards Developing Community Guidelines for Sharing and Reusing Quality Information of Earth Science Datasets,” given by Carlo Lacagnina, Barcelona Supercomputing Centre.

Senior digital archivist Robert Downs participated virtually in the Research Data Alliance (RDA) 17th Plenary Meeting (RDA P17) April 20–23 and the 16th International Digital Curation Conference (IDCC21) on April 19, both coordinated from Edinburgh, Scotland. During RDA P17, Downs presented the poster, “Peer Review of Open Research Data: The Approach of a Scientific Data Center.” He also chaired the joint session, “Collaborating to Improve Platforms and Share Resources among Open Data Repositories,” where he presented, “Improving Repositories through Collaboration.”  At the IDCC21, Downs gave the presentation, “Documentation to Foster Sharing and Use of Open Earth Science Data: Quality Information,” co-authored with Ge Peng of NASA’s Marshall Space Flight Center, David Moroni of NASA’s Jet Propulsion Laboratory, Hampapuram Ramapriyan of Science Systems and Applications, Inc., and Yaxing Wei of Oak Ridge National Laboratory. 

As part of the International Research Institute for Climate and Society (IRI) seminar on April 20, CIESIN postdoctoral research scientist Carolynne Hultquist gave the presentation, “Bringing Vulnerable Populations into the Flood Risk Equation.” Two graduate student interns also participated: Raychell Velez, who is working toward her MS in geographic information systems (GIS) at Lehman College of the City University of New York; and Colleen Neely, an MPA student in environmental science and policy at Columbia’s School of International and Public Affairs (SIPA). Hultquist gave an overview of relevant data and services from the NASA Socioeconomic Data and Applications Center (SEDAC) and described ongoing efforts to improve vulnerability data for flood risk assessment. Velez presented work supported by SEDAC to develop high resolution data on building exposure to floods using artificial intelligence (AI) approaches. Neely, an Earth Institute intern with Hultquist and IRI scientist Andrew Kruczkiewicz, discussed work on a high resolution flood vulnerability index for Houston, Texas, designed to support more equitable flood mitigation efforts.

The NASA Socioeconomic Data and Applications Center (SEDAC) operated by CIESIN has released several new data sets related to hazards, infant mortality, and future socioeconomic scenarios. The Geocoded Disasters (GDIS) Dataset is a geocoded extension of a selection of natural disasters from the Centre for Research on the Epidemiology of Disaster (CRED) Emergency Events Database (EM-DAT). The data set includes nearly 40,000 locations for almost 10,000 disasters worldwide for the 58-year period spanning 1960–2018. It encompasses all EM-DAT-recorded floods, storms, earthquakes, landslides, droughts, volcanic activity and extreme temperatures, some at administrative level 3 (district/commune/village) but most at 1 (typically state/province/region). GDIS facilitates geospatial analysis of past hazard events.

The Shared Socioeconomic Pathways (SSPs) Literature Database consists of biographic information, abstracts, and analysis of 1,360 articles published 2014–2019 that make substantial use of the SSPs. The database was developed by Carole Green et al. as the basis for a recent article in Nature Climate Change that analyzes use of the Climate Change Scenario Framework and associated scenario data sets in diverse application areas and in assessments of the Intergovernmental Panel on Climate Change (IPCC). The International Committee on New Integrated Climate Change Assessment Scenarios (ICONICS) is planning to extend the literature database. SEDAC User Working Group member Brian O'Neill of the Joint Climate Change Research Institute and CIESIN director Robert Chen are members of ICONICS.

Global Subnational Infant Mortality Rates (IMR), Version 2.01, provides more recent and higher-resolution infant mortality data, including estimates of births and infant deaths. The estimates are for 234 countries and territories, 143 of which include subnational units and are benchmarked to the year 2015 (versus year 2000 for the first version). IMR data are drawn from national offices, Demographic and Health Surveys (DHS), Multiple Indicator Cluster Surveys (MICS), and other sources covering 2006–2014. The birth and infant death data can be aggregated or disaggregated to calculate IMRs at different scales or resolutions. Boundary inputs are derived primarily from the Gridded Population of the World, Version 4 (GPWv4) data collection. National and subnational data are mapped at a spatial resolution of 30 arc-seconds (~1 km at the equator), facilitating integration with demographic, environmental, and other spatial data. Data set development was led by senior geographic information specialist Dara Mendeloff and research scientist Susana Adamo.

The data set, Georeferenced U.S. County-Level Population Projections, Total and by Sex, Race and Age, Based on the SSPs, 2020–2100, contains county-level population projection scenarios of total population, and by age, sex, and race in five-year intervals for all US counties 2020–2100. These data can serve as inputs for addressing questions involving sub-national demographic change in the United States in the near, middle- and long-term. 

The Joint Research Centre (JRC) of the European Commission has released the 2020 edition of the Atlas of the Human Planet, focused on open geoinformation for research, policy, and action, under the auspices of the Human Planet Initiative of the Group on Earth Observations (GEO). This year′s Atlas features more than 30 applications of the georeferenced human settlement and population data in four thematic areas: disaster risk management, urbanization, development, and environment and sustainability. Two of the applications showcased were developed by CIESIN: the Global COVID-19 Viewer operated by the NASA Socioeconomic Data and Applications Center (SEDAC), in “Mapping the COVID-19 Pandemic and Potential Risk Factors,″ and a summary of an update to a 2007 data set available from SEDAC, in “New Estimates of Global Population and Land in the Low Elevation Coastal Zone Using GHSL-based Data Sets.″ The first showcase was prepared by CIESIN director Robert Chen, GIS programmer Kytt MacManus, and associate director for Science Applications Alex de Sherbinin. The second was authored by MacManus, former SEDAC project scientist Deborah Balk of Baruch College, staff associate Hasim Engin, UK demographer Gordon McGranahan, former research staff assistant Rya Inman, and intern Alexandra Hayes.

The JRC organized a virtual launch event January 21 that drew more than 90 participants. The event included 4 short presentations on selected applications, including the Global COVID-19 Viewer example, described by Chen. The Viewer, developed and enhanced in 2020, helps users visualize a range of data on COVID-19 cases and mortality in relationship to spatial data on demographic and environmental factors that may affect exposure and vulnerability, such as age structure, degree of urbanization, air quality, and elevation. Chen and Martino Pesaresi of the JRC are co-leaders of the GEO Human Planet Initiative.

Due to the ongoing pandemic, many international conferences have shifted to online, virtual platforms in 2020, opening up opportunities for CIESIN staff to interact remotely with new communities and showcase recent work and new resources. For example, associate director for Science Applications Alex de Sherbinin recently gave a remote keynote address, “Groundswell Model Results for South Asia,” November 25 at the International Conference on Building Resilient and Sustainable Societies, organized by Jamia Millia Islamia University in New Delhi. The address discussed ongoing work with the World Bank to model how climate impacts may induce migration out to 2050. He and research scientist Susana Adamo also participated in the virtual meeting of the Platform for Disaster Displacement’s Data and Knowledge Working Group November 24, where they gave the respective presentations, “Novel and Big Data Approaches to Identifying Disaster Displacement,” and “Migration, the COVID-19 Pandemic, and Climate in Central America’s Northern Triangle.”

During the International CODATA FAIR Convergence Symposium 2020 held virtually November 27–December 4, CIESIN director Robert Chen presented in a panel session, “Synergies between Citizen Science Data and the UN Sustainable Development Goal (SDG) Indicators,” organized by Dilek Fraisl of the International Institute for Applied Systems Analysis (IIASA) in Austria. Chen then led a breakout group within this session. Alex de Sherbinin also contributed to the session, “Citizen Science in Africa for the SDGs,” giving closing remarks. The Symposium was organized by the Committee on Data (CODATA) of the International Science Council and the GO FAIR initiative.

On December 1 Chen gave a short presentation, “Open Data Sharing Across the Disaster Lifecycle," in the community session, "A Call to Action for Resilience: Moving from Research to Practice,” held as part of the World Bank’s 2020 Understanding Risk Forum (UR2020) December 1–3. The session was organized by Charles Huyck of ImageCat, Inc. and Shanna McClain of NASA. Chen highlighted the importance of open data access and reuse throughout the disaster management lifecycle, not just in the immediate aftermath of an extreme event.

CIESIN has developed a collaboration with the Department of Earth, Environmental, and Geospatial Sciences at Lehman College of the City University of New York to develop and enhance hazards data, working initially with five Lehman graduate and undergraduate students. Supervised by CIESIN alumnus Yuri Gorokhovich, associate professor in the Department, the students are Christopher Aime, Diana Calderón, Nira Rahman, and Raychell Velez from Lehman's Master′s program in Geographic Information Science; and Hadja Doumbouya, a senior majoring in environmental sciences. CIESIN associate director for Geospatial Applications Greg Yetman is assisting the students in using machine learning methods to develop improved data on the exposure and vulnerability of buildings and other infrastructure to hazards, extending recent work for the State of New York supported by the New York State Energy Research and Development Authority (NYSERDA). Carolynne Hultquist, CIESIN postdoctoral research scientist, and Andrew Kruczkiewicz, senior staff associate at the International Research Institute for Climate and Society (IRI), are also working with the students to apply the data to flash flood hazard assessment.

The collaboration is supported by the NASA Socioeconomic Data and Applications Center (SEDAC) as part of SEDAC's efforts to achieve small business purchasing goals established by NASA, which include collaboration with Minority Serving Institutions (MSIs) and Historically Black Colleges and Universities (HBCUs). Outputs of the collaboration will be made available via SEDAC after appropriate review. Based in the Bronx, Lehman is one of the only MSIs (or HBCU′s) in the US to offer a master of science degree in geographic information science.

Alex de Sherbinin, associate director for Science Applications, is guest editor of a special Issue of the journal Sustainability on climate risk and vulnerability mapping, with co-editor Stefan Kienberger of the University of Salzburg. He is also a co-author of one of the papers in the special issue, on using flood disaster data to validate components of social vulnerability to floods. The paper’s lead author is Earth Institute Fellow Beth Tellman.

The article, “Still in Need of Norms: The State of the Data in Citizen Science,″ has been published in the journal Citizen Science: Theory and Practice. Anne Bowser of the Wilson Center is lead author, and de Sherbinin is a co-author. The article is a major output of the CODATA-World Data System (WDS) Task Group on Citizen Science and the Validation, Curation, and Management of Crowdsourced Data, which de Sherbinin co-chaired in 2016-2018.

Senior digital archivist Robert Downs is a co-author of the report, “Laying the Groundwork for Developing International Community Guidelines to Effectively Share and Reuse Digital Data Quality Information—Case Statement, Workshop Summary Report, and Path Forward,” published in Open Science Foundation (OSF) Preprints. Ge Peng of the Earth Science Information Partners (ESIP) Information Quality Cluster is lead author. The report, which stems from a pre-workshop held in July 2020 prior to the ESIP Summer Meeting, describes the approach that will be taken to develop community guidelines for preparing and sharing data quality information.

The Geo-Referenced Infrastructure and Demographic Data for Development (GRID3) program managed by CIESIN has released the white paper, “Harmonizing Subnational Boundaries,” on GRID3 efforts to support the harmonization, production, and use of digitized legal/administrative units, operational units, and statistical areas. This work addresses three primary areas: improving and harmonizing operational units; fostering improved collaboration on boundary harmonization among disparate government bodies; and using boundaries harmonization to support census efforts. The paper focuses on case studies in Nigeria, the Democratic Republic of the Congo, and Zambia.

Several new interns have joined CIESIN this summer, working remotely due to closure of CIESIN offices along with the rest of Columbia University during the COVID-19 pandemic.

Alexandra Hays is working with senior systems analyst/GIS developer Kytt MacManus on the third version of the Urban-Rural Population and Land Area Estimates, which is part of the Low Elevation Coastal Zone (LECZ) data collection developed by the NASA Socioeconomic Data and Applications Center (SEDAC). Hays is a senior at Columbia University majoring in economics, with a concentration in sustainable development. Interns Serena Killion and Caitlyn Linehan are also working with MacManus, on analysis of nighttime lights data and development of map services for SEDAC. Killion is a senior at Columbia, majoring in computer science; Linehan is completing her MS in geographic information systems (GIS) at City University of New York-Lehman College.

Four interns are working with Greg Yetman, associate director for geospatial applications, on a project supported by the New York State Energy Research and Development Authority (NYSERDA) to assess potential flood impacts on building infrastructure. Elizabeth Jackson and Elan Ganeles are juniors at Columbia; Jackson is majoring in sustainable development, and Ganeles is majoring in urban studies and earth science. Chris Mangnani is a senior at Columbia majoring in sustainable development. Siobhan Milán is a junior from the University of Virginia, majoring in economics with a minor in statistics.

Interns under CIESIN’s Geo-Referenced Infrastructure and Demographic Data for Development (GRID3) program include Mariem Ayadi, Zane Peycke, and Nancy Yun, who are completing their MS degrees in data science at Columbia′s Data Science Institute. Ayadi is working with data and program analyst Jolynn Schmidt and senior research associate Paola Kim-Blanco, creating a model that checks for errors in building footprints data. Peycke and Yun are both working with Schmidt; Peycke is is cleaning and compiling points of interest data for the Democratic Republic of Congo, and Yun is cleaning and compiling health facility data for countries in sub-Saharan Africa.

Associate director for Science Applications Alex de Sherbinin is a co-author of the open access article, “A Systematic Review of Coastal Vulnerability Mapping,” appearing in the journal Sustainability. The paper, by Anamaria Bukvic of Virginia Polytechnic Institute and State University, Guillaume Rohat of the University of Geneva, Alex Apotsos of Williams College, and de Sherbinin, evaluates the state of coastal vulnerability assessment mapping efforts and recommends improvements in methodological rigor, policy relevance, and alignment with other vulnerability assessment paradigms. The paper stems from previous work supported by the National Socio-Environmental Synthesis Center (SESYNC) under funding received from the National Science Foundation. The paper is dedicated to the memory of second author Rohat, who passed away unexpectedly in October 2019.

Senior digital archivist Robert Downs is also co-author of the open access paper, “Risk Assessment for Scientific Data,” published in the CODATA Data Science Journal. Authors of the paper are Matthew Mayernik of the National Center for Atmospheric Research; Kelsey Breseman of the Environmental Data & Governance Initiative (EDGI); Downs; Ruth Duerr of the Ronan Institute for Independent Scholarship; Alexis Garretson of George Mason University; Chung-Yi (Sophie) Hou of the Ronin Institute; EDGI; and the Earth Science Information Partners (ESIP) Data Stewardship Committee. The paper presents an analysis of data risk factors that scientific data collections may face, together with a data risk assessment matrix to support risk assessment and mitigation efforts.

The largest international Earth and space science conference in the world, the annual American Geophysical Union (AGU) fall meeting, brought more than 25,000 scientists and other experts to San Francisco December 9–13. CIESIN staff members organized or co-organized seven sessions; presented more than twelve invited, oral, e-lightning, and poster papers; and served as co-authors on at least nine other papers. CIESIN director Robert Chen convened three sessions on exposure and vulnerability assessment for hazard, coastal, climate, and health risks and served as co-chair of one of them. Associate director for Science Applications Alex de Sherbinin also co-chaired the poster session in this series. Senior digital archivist Robert Downs co-organized a session on improving use of the FAIR principles (Findable, Accessible, Interoperable, and Reusable), as well as several sessions on the use of earth and space science data.

Also attending the conference were associate director for Geospatial Applications Greg Yetman, GIS developer Kytt MacManus, and Columbia College student Dorothee Cleophee Grant, a former summer intern. Yetman gave an oral presentation on population data models for settlement extents and a NASA Hyperwall talk, “Are You at Risk? Linking Hazard and Exposure Data for Research and Applications.” MacManus gave an oral presentation on new sources for the updated version of low-elevation coastal zone data, expected to be released in early 2020. He also presented a poster paper on a nighttime lights dataset recently released by the NASA Socioeconomic Data and Applications Center (SEDAC), to which Grant had contributed.

While at the conference, de Sherbinin gave invited talks and served as a panelist in three different sessions on open data digital repositories for developing countries, climate vulnerability mapping, and managed retreat due to climate change. Chen gave presentations on the FAIR principles and open data and on the use of Earth Observations to operationalize the fundamental geospatial data themes established by the United Nations. Downs gave an e-lightning talk on citing open data and presented a case study on data sharing and data management guidance developed by the Group on Earth Observations (GEO). Both Downs and Chen also served as judges on student papers.

CIESIN has successfully teamed with scientists at the Lamont-Doherty Earth Observatory and with external partners on several new project awards and initiatives. Associate director for Science Applications Alex de Sherbinin is one of the co-investigators on a new four-year “convergence“ research grant from the National Science Foundation (NSF), related to climate change, food security and migration. The principal investigator of the grant is Lamont Research Professor Richard Seager, and other participants include Wolfram Schlenker of Columbia′s School of International and Public Affairs (SIPA) and Michael Puma, director of the Earth Institute's Center for Climate Systems Research (CCSR).

Associate director for Geospatial Applications Greg Yetman is the lead of a sub-award to ImageCat, Inc. on a NASA-funded disasters project on critical infrastructure data. CIESIN has had numerous collaborations with ImageCat on hazard data research and development in the past, and ImageCat is active in several CIESIN-led initiatives such as the POPGRID Data Collaborative and its NASA-supported Human Planet project.

Senior systems analyst/GIS developer Kytt MacManus has been awarded a project from the World Resources Institute, in which he is contributing to the development of new sea-level rise estimates to a new report by the Coalition for Urban Transition on addressing urban climate change issues. MacManus is also the principal investigator of a new “flexible contract” with the New York State Energy Research and Development Authority (NYSERDA) that allows for small non-competitive awards on energy and climate activities.

The Hazards and Population Mapper (HazPop) mobile app, a tool designed to put hazard-related data and information at your fingertips, is now available on both smartphones and tablets running iOS and Android. HazPop simplifies access to a range of distributed data services providing near-real-time data, including active fires and air pollution data (Aerosol Optical Depth) from NASA, earthquake alerts from the U.S. Geological Survey (USGS), and volcanic activity from the Smithsonian Institution's Global Volcanism Program. These data may be viewed in combination with data on population distribution and infrastructure, such as major dams and reservoirs and nuclear power plants, provided by the NASA Socioeconomic Data and Applications Center (SEDAC) operated by CIESIN.

Users interested in knowing how many people might be affected by a current or potential hazard may draw a circle around their own location or any other point of interest to obtain population estimates during the period 2000–2020.

HazPop is meant for those who need a quick assessment of the population potentially at risk from a major hazard event or developing emergency, such as disaster risk managers, humanitarian response organizations, public health professionals, and journalists. It is not intended to support in-depth risk assessment or estimation of actual disaster losses.

The app may be downloaded for free from the Apple App Store or from Google Play. It is compatible with iPhone, iPad, and iPod touch running iOS 9.0 or later, and with smartphones and tablets with Android 5.0 or later.

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Several publications authored or co-authored by CIESIN staff have been published recently. Associate director for Science Applications Alex de Sherbinin is lead author of the paper, “Climate Vulnerability Mapping: A Systematic Review and Future Prospects,” appearing in the peer-reviewed journal, WIREs Climate Change. The article reports on a study to systematically assess 84 climate vulnerability mapping studies, with the goal of encouraging further methodological refinement and identifying outstanding examples that could help to guide future work in this area. The study benefited from two workshops held in 2017 supported by National Socio‐Environmental Synthesis Center (SESYNC) and funded by the U.S. National Science Foundation.

The article, “Allocating People to Pixels: A Review of Large-Scale Gridded Population Data Products and Their Fitness for Use,” has been published in the journal Earth Systems Science Data. The lead author is Stefan Leyk of the University of Colorado. CIESIN contributors are de Sherbinin, research scientist Susana Adamo, senior systems analyst Kytt MacManus, senior geographic information specialist Linda Pistolesi, and deputy director Marc Levy. Former CIESIN research scientist Deborah Balk, who is now associate director of the Institute for Demographic Research at the City University of New York (CUNY), is also a co-author. The paper is an outcome of the POPGRID Data Collaborative, an international effort to coordinate and improve the utility of global-scale gridded population data.

Former CIESIN visiting scholar Douglas Sathler is lead author of “Assessing the Regional Context of Migration in the Brazilian Amazon through Spatial Regression Modeling” in the journal Applied Geography. Co-authors include Adamo, de Sherbinin, and senior research associate Paola Kim-Blanco. The article examines spatial patterns of both in-migration and outimigration in the Brazilian Amazon during the period 2000–2010. Sathler is a researcher with the Center for Geosciences of the Interdisciplinary College in Humanities at the Federal University of Vales do Jequitinhonha e Mucuri (UFVJM) in Diamantina, Brazil.

Greg Yetman, associate director for Geospatial Applications, is a co-author on the paper, “Evaluating Nighttime Lights and Population Distribution as Proxies for Mapping Anthropogenic CO₂ Emission in Vietnam, Cambodia, and Laos.” Andrea Gaughan of the University of Louisville is lead author of the paper, which was published in Environmental Research Communications. The paper stems from work organized by the WorldPop project.

Senior digital archivist Robert Downs is lead author of the Technical Note, “Reuse Readiness Assessment of Data Quality Software Products (ESDS-RFC-039),” co-authored with Hampapuram Ramapriyan of Science Systems and Applications, Inc. and Yang Wei of the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC). The Data Quality Working Group of the Earth Science Data and Information System (ESDIS) Standards Office (ESO) recommends this assessment for use in NASA Earth Science Data Systems.

Credit: Chandranath Basak

CIESIN senior research associate Pinki Mondal has been featured in a NASA Earthdata user profile published online May 24. The user profile is part of a regular series about users of NASA earth science data. Mondal combines remotely-sensed data with census and other data to study the effects of climate change on agricultural systems and communities. Her current research focuses on smallholder farms in tropical countries that can be especially vulnerable to climate variability and to impacts from socioeconomic factors such as urbanization and government policies. She utilizes microwave satellite data, Synthetic Aperture Radar (SAR) data, and high-resolution optical satellite data from a variety of sources to help characterize land use/land cover changes over time in relationship to climate and other factors.

For the NASA Socioeconomic Data and Applications Center (SEDAC) operated by CIESIN, Mondal has had lead responsibility for establishing the India Data Collection, which currently consists of the India Village-Level Geospatial Socio-Economic Data Set:1991, 2001 and the India Annual Winter Cropped Area, v1 (2001–2016). She also led development of the Global Summer Land Surface Temperature (LS) Grids, v1, and helped develop the Global Urban Heat Island (UHI) Data Set, v1 (2013), as well as other SEDAC data sets.

In August, Mondal will begin a position as assistant professor in the Department of Geography at the University of Delaware in Newark, Delaware.

As part of festivities worldwide celebrating Earth Day, CIESIN participated in a fair at St. Thomas Aquinas College (STAC) in Sparkill, New York, April 17, co-hosted by STAC and Columbia University′s Lamont-Doherty Earth Observatory. The free event, held for the third year, was attended by both undergraduate and K-12 students and  educators, together with members of the general public. Senior research staff assistant Alyssa Fico coordinated CIESIN’s participation in the event, with the assistance of geographic information specialist Linda Pistolesi, staff associate Emilie Schnarr, and CIESIN director Robert Chen. They demonstrated the Hazards Mapper and HazPop mobile app developed by the NASA Socioeconomic Data and Applications Center operated by CIESIN. They also engaged attendees in an interactive data gathering exercise using online geographic information system (GIS) software to locate nearby areas of interest such as eateries, parks, and schools. The fair featured environmental science projects conducted by STAC students as well as a range of hands-on science education activities offered by other scientists from around the Lamont campus.

Alex de Sherbinin, CIESIN associate director for Science Applications, participated in a National Socio-Environmental Synthesis Center (SESYNC) Pursuit event March 28–29 that focused on populations displaced by sea level rise and coastal extremes. The workshop was hosted by the University of Maryland in Annapolis and led by David Wrathall of Oregon State University and Valerie Mueller of Arizona State University. Twenty researchers from a variety of academic and government institutions in the United States and abroad were invited to participate. Funded by a grant from the U.S. National Science Foundation, SESYNC facilitates interdisciplinary collaborations to develop data-driven solutions to socio-environmental issues.

TerraViva! SEDAC Viewer is a map viewer and standalone software application that uses a powerful data-viewing engine and tools to enable the visualization and integration of hundreds of socioeconomic and environmental variables and layers, including a range of satellite-based data. A three-part tutorial that explains how to use TerraViva! is now available through the YouTube Web site. The tutorial was produced by senior research associate Alex de Sherbinin and senior media designer Al Pinto, under the auspices of the NASA Socioeconomic Data and Applications Center (SEDAC) operated by CIESIN.