Xianjun Hao
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View article: Optimizing context-based location extraction by tuning open-source LLMs with RAG
Optimizing context-based location extraction by tuning open-source LLMs with RAG Open
Text data such as news from media include different types of geographic information, represented by location, that indicates the whereabout of events or phenomena. Extracting the geographic locations from text within their contexts is chal…
View article: A Preliminary Assessment of the VIIRS Cloud Top and Base Height Environmental Data Record Reprocessing
A Preliminary Assessment of the VIIRS Cloud Top and Base Height Environmental Data Record Reprocessing Open
The Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi National Polar-orbiting Partnership (SNPP) satellite has been continuously providing global environmental data records (EDRs) for more than one decade since its launch…
View article: Open science 2.0: revolutionizing spatiotemporal data sharing and collaboration
Open science 2.0: revolutionizing spatiotemporal data sharing and collaboration Open
The Spatial Data Lab (SDL) project is a collaborative initiative by the Center for Geographic Analysis at Harvard University, KNIME, Future Data Lab, China Data Institute, and George Mason University. Co-sponsored by the NSF IUCRC Spatiote…
View article: Data Augmentation Strategies for Improved PM2.5 Forecasting Using Transformer Architectures
Data Augmentation Strategies for Improved PM2.5 Forecasting Using Transformer Architectures Open
Breathing in fine particulate matter of diameter less than 2.5 µm (PM2.5) greatly increases an individual’s risk of cardiovascular and respiratory diseases. As climate change progresses, extreme weather events, including wildfires, are exp…
View article: A Preliminary Assessment of Land Restoration Progress in the Great Green Wall Initiative Region Using Satellite Remote Sensing Measurements
A Preliminary Assessment of Land Restoration Progress in the Great Green Wall Initiative Region Using Satellite Remote Sensing Measurements Open
The Great Green Wall (GGW) initiative, which started in 2007 and is still in development as of 2024, aims to combat desertification and enhance sustainability over 8000 km across Africa’s Sahel-Sahara region, encompassing 11 key countries …
View article: Research Progress on Urban Street Canyon Heat Island Effect
Research Progress on Urban Street Canyon Heat Island Effect Open
With the continuous improvement of urbanization level and the increasing urban spatial density, the urban heat island effect is intensifying, resulting in the increasing range and intensity of extreme climate, which poses a threat to the p…
View article: Mid‐Tropospheric Layer Temperature Record Derived From Satellite Microwave Sounder Observations With Backward Merging Approach
Mid‐Tropospheric Layer Temperature Record Derived From Satellite Microwave Sounder Observations With Backward Merging Approach Open
We present a new version (v5.0) of the NOAA Center for Satellite Applications and Research (STAR) mid‐tropospheric temperature (TMT) time series. This data set uses a backward‐merging approach to intercalibrate 16 satellite‐based microwave…
View article: Nutrient enhanced reclamation promoted growth, diversity and activities of carbon fixing microbes in a coal-mining subsistence land
Nutrient enhanced reclamation promoted growth, diversity and activities of carbon fixing microbes in a coal-mining subsistence land Open
Carbon-fixing microbes can potentially improve soil fertility. However, the potential and function of carbon-fixing microbes remains largely uninvestigated in reclaimed soil of coal-mining subsidence areas. In this study, treatments includ…
View article: Spatiotemporal Trends and Variations of the Rainfall Amount, Intensity, and Frequency in TRMM Multi-satellite Precipitation Analysis (TMPA) Data
Spatiotemporal Trends and Variations of the Rainfall Amount, Intensity, and Frequency in TRMM Multi-satellite Precipitation Analysis (TMPA) Data Open
The spatiotemporal mean rain rate (MR) can be characterized by the rain frequency (RF) and the conditional rain rate (CR). We computed these parameters for each season using the TMPA 3-hourly, 0.25° gridded data for the 1998–2017 period at…
View article: Assessment of the Reprocessed Suomi NPP VIIRS Enterprise Cloud Mask Product
Assessment of the Reprocessed Suomi NPP VIIRS Enterprise Cloud Mask Product Open
The Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi National Polar-orbiting Partnership (S-NPP) satellite continually provides global observations used to retrieve over 20 VIIRS Environmental Data Record (EDR) products.…
View article: Post‐Millennium Atmospheric Temperature Trends Observed From Satellites in Stable Orbits
Post‐Millennium Atmospheric Temperature Trends Observed From Satellites in Stable Orbits Open
We develop a post‐millennium mid‐tropospheric temperature time series from continuous observations by advanced microwave sounders onboard satellites in stable sun‐synchronous orbits. Such observations have high radiometric stability and do…
View article: The Reprocessed Suomi NPP Satellite Observations
The Reprocessed Suomi NPP Satellite Observations Open
The launch of the National Oceanic and Atmospheric Administration (NOAA)/ National Aeronautics and Space Administration (NASA) Suomi National Polar-orbiting Partnership (S-NPP) and its follow-on NOAA Joint Polar Satellite Systems (JPSS) sa…
View article: Surface soil temperature seasonal variation estimation in a forested area using combined satellite observations and in-situ measurements
Surface soil temperature seasonal variation estimation in a forested area using combined satellite observations and in-situ measurements Open
View article: Monitoring Surface Soil Moisture Content over the Vegetated Area by Integrating Optical and SAR Satellite Observations in the Permafrost Region of Tibetan Plateau
Monitoring Surface Soil Moisture Content over the Vegetated Area by Integrating Optical and SAR Satellite Observations in the Permafrost Region of Tibetan Plateau Open
Surface soil moisture (SSM), the average water content of surface soil (up to 5 cm depth), plays a key role in the energy exchange within the ecosystem. We estimated SSM in areas with vegetation cover (grassland) by combining microwave and…
View article: Daytime Rainy Cloud Detection and Convective Precipitation Delineation Based on a Deep Neural Network Method Using GOES-16 ABI Images
Daytime Rainy Cloud Detection and Convective Precipitation Delineation Based on a Deep Neural Network Method Using GOES-16 ABI Images Open
Precipitation, especially convective precipitation, is highly associated with hydrological disasters (e.g., floods and drought) that have negative impacts on agricultural productivity, society, and the environment. To mitigate these negati…
View article: Monitoring Extreme Agricultural Drought over the Horn of Africa (HOA) Using Remote Sensing Measurements
Monitoring Extreme Agricultural Drought over the Horn of Africa (HOA) Using Remote Sensing Measurements Open
The Horn of Africa ((HOA), including Djibouti, Eritrea, Ethiopia, and Somalia) has been slammed by extreme drought within the past years, and has become one of the most food-insecure regions in the world. Millions of people in the HOA are …
View article: New generation of U.S. satellite microwave sounder achieves high radiometric stability performance for reliable climate change detection
New generation of U.S. satellite microwave sounder achieves high radiometric stability performance for reliable climate change detection Open
How accurate can satellite measure the climate trends in atmospheric temperatures?
View article: Downscaling of Surface Soil Moisture Retrieval by Combining MODIS/Landsat and In Situ Measurements
Downscaling of Surface Soil Moisture Retrieval by Combining MODIS/Landsat and In Situ Measurements Open
Soil moisture, especially surface soil moisture (SSM), plays an important role in the development of various natural hazards that result from extreme weather events such as drought, flooding, and landslides. There have been many remote sen…
View article: THE IMPACT OF SPATIAL AND TEMPORAL RESOLUTIONS IN TROPICAL SUMMERRAINFALL DISTRIBUTION: PRELIMINARY RESULTS
THE IMPACT OF SPATIAL AND TEMPORAL RESOLUTIONS IN TROPICAL SUMMERRAINFALL DISTRIBUTION: PRELIMINARY RESULTS Open
The abundance or lack of rainfall affects peoples’ life and activities. As a major component of the global hydrological cycle (Chokngamwong & Chiu, 2007), accurate representations at various spatial and temporal scales are crucial for …
View article: Saharan dust detection using multi-sensor satellite measurements
Saharan dust detection using multi-sensor satellite measurements Open
Contemporary scientists have vested interest in trying to understand the climatology of the North Atlantic Basin since this region is considered as the genesis for hurricane formation that eventually get shipped to the tropical Atlantic re…
View article: Method for Classification of Battery Separator Defects Using Optical Inspection
Method for Classification of Battery Separator Defects Using Optical Inspection Open
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View article: Assessing the Impact of Year 2012 Drought on Corn Yield in the US Corn Belt Using Precipitation Data
Assessing the Impact of Year 2012 Drought on Corn Yield in the US Corn Belt Using Precipitation Data Open
Extreme weather and climate events are likely to cause disastrous consequences for agriculture and food security. This study investigated the impacts of drought in year 2012 on corn yield in the United States Corn Belt by integrating count…