A5059120837- Hydrology and Drought Analysis
- Climate variability and models
- Hydrology and Watershed Management Studies
- Climate change impacts on agriculture
- Cryospheric studies and observations
- Flood Risk Assessment and Management
- Energy, Environment, and Transportation Policies
- Plant Water Relations and Carbon Dynamics
- Soil Moisture and Remote Sensing
- Energy and Environment Impacts
- Crop Yield and Soil Fertility
- Scientific Computing and Data Management
- Solar Radiation and Photovoltaics
- Plant responses to elevated CO2
- Remote Sensing in Agriculture
- Big Data Technologies and Applications
- Environmental Impact and Sustainability
- Big Data and Business Intelligence
- Water-Energy-Food Nexus Studies
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Precipitation Measurement and Analysis
- Tropical and Extratropical Cyclones Research
- Geophysics and Gravity Measurements
- Global Energy and Sustainability Research
Descartes Labs (United States)
2019-2021
Stanford University
2018-2020
Princeton University
2014-2020
Abstract Understanding the evolution and physical drivers of drought is critical to informing forecasting efforts. One aspect that has seldom been explored joint droughts in space time. Most studies fix reference area focus on their temporal variability or study spatial heterogeneity over fixed durations. This work implements a Lagrangian approach by aggregating contiguous areas under into clusters. These clusters become frame are tracked as they evolve through Clusters were identified from...
Abstract Many mountainous and high‐latitude regions have experienced more precipitation as rain rather than snow due to warmer winter temperatures. Further decreases in the annual fraction are projected under continued global warming, with potential impacts on flood risk. Here, we quantify size of streamflow peaks response both seasonal event‐specific rain‐fraction using stream gage observations from watersheds across western United States. Across study watersheds, largest rainfall‐driven...
The spatial heterogeneity of soil moisture remains a persistent challenge in the design situ measurement networks, downscaling coarse estimates (e.g., satellite retrievals), and hydrologic modeling.To address this challenge, we analyze high-resolution (9 m) simulated fields over Little River Experimental Watershed (LREW) Georgia, USA, to assess role interaction controls moisture.We calibrate validate TOPLATS distributed model with high moderate resolution land meteorological data sets...
Abstract Droughts can have devastating societal impacts. Yet, we do not fully understand the mechanisms that control their development, possibly affecting our ability to predict them. Here run a moisture‐tracking analytical model using reanalysis data between 1980 and 2016 explore role of reduced moisture transport in drought propagation. We find agricultural droughts multiple subregions across North America may be amplified by decreased from upwind land areas, which link evapotranspiration...
Droughts and heat waves have important impacts on multiple sectors including water resources, agriculture, electricity generation, public health, so it is to understand how they will be affected by climate change. However, there large uncertainty in the projected changes of these extreme events from models. In this study, historical biases models are compared against their future projections attempt constrain uncertainties. Biases precipitation, near-surface air temperature,...
Abstract Droughts threaten food, energy, and water security, causing death displacement of millions people billions dollars in damages. However, there are still important gaps the understanding drought mechanisms behaviors, inhibiting accuracy early‐warning systems designed to protect communities worldwide. We use an object‐tracking algorithm track clusters precipitation‐minus‐evaporation moisture deficits across land ocean areas globe from 1981–2018. This analysis reveals a new type...
Abstract We investigate the role of moisture transport and recycling in characterizing two recent drought events Texas (2011) Upper Midwest (2012) by analyzing precipitation, evapotranspiration, precipitable water, soil data from Climate Forecast System version 2 (CFSv2) analysis. Next, we evaluate CFSv2 forecasts terms their ability to capture different signals as reflected analysis data. Precipitation both sources is partitioned into recycled advected components using a accounting–based...
Understanding how global change is impacting African agriculture requires a full physical accounting of water supply and demand, but accurate, gridded data on key drivers (e.g., humidity) are generally unavailable. We used new bias-corrected meteorological dataset to analyze changes in precipitation (supply), potential evapotranspiration (, demand), availability (expressed as the ratio ) 20 countries (focusing their maize-growing regions seasons), between 1979 2010, factors driving ....
Water is needed for hydroelectric generation and to cool thermoelectric power plants. This dependence on water makes electricity vulnerable droughts. Furthermore, because sector CO2 emissions amount approximately one third of total US emissions, droughts could influence the inter-annual variability state- national-scale emissions. However, magnitude drought-induced changes in not well understood, especially context climate mitigation policies. Using multivariate linear regressions, we find...
<p>Drought is the most threatening natural hazard for agriculture. Between 1983 and 2003, drought led to a cumulative agriculture production loss of 166 billion U.S. dollars globally, thus monitoring forecasting capabilities are essential adaptation preparedness. Soil moisture simulations play an indispensable role in reconstructing historic conditions predicting future scenarios. However, there spatial scale gap between resolution soil moisture-based indices...