A5040548516- Climate variability and models
- Meteorological Phenomena and Simulations
- Tropical and Extratropical Cyclones Research
- Hydrology and Watershed Management Studies
- Atmospheric and Environmental Gas Dynamics
- Hydrology and Drought Analysis
- Cryospheric studies and observations
- Groundwater and Isotope Geochemistry
- Arctic and Antarctic ice dynamics
- Oceanographic and Atmospheric Processes
- Ocean Waves and Remote Sensing
- Plant Water Relations and Carbon Dynamics
- Fire effects on ecosystems
- Climate change and permafrost
- Groundwater flow and contamination studies
- Geology and Paleoclimatology Research
- Ionosphere and magnetosphere dynamics
- Geological and Geophysical Studies
- Methane Hydrates and Related Phenomena
- Solar and Space Plasma Dynamics
- Marine and coastal ecosystems
- Geophysics and Gravity Measurements
Mississippi State University
2023-2024
Northern Gulf Institute
2023-2024
University of California, Los Angeles
2020-2022
Consolidated Safety Services-Dynamac (United States)
2021
Utah State University
2015-2018
Abstract Dynamical downscaling remains a powerful tool for studying regional climate processes, and the genesis of high‐resolution historical future data. This technique is particularly important over areas complex terrain, such as western United States (WUS), where global models are especially limited in representing climate. After identifying suite WRF options that best simulate snow precipitation an average water year (2010) WUS, we evaluate performance dynamically downscaled European...
Abstract Southern California is a biodiversity hotspot and home to over 23 million people. Over recent decades the annual wildfire area in coastal southern region has not significantly changed. Yet how fire regime will respond future anthropogenic climate change remains an important question. Here, we estimate probability at station scale daily resolution using random forest algorithms downscaled earth system model simulations. We project that large days increase from 36 days/year during...
Abstract We compare historical and end‐of‐century temperature precipitation patterns over California from one dynamically downscaled simulation using the Weather Research Forecast (WRF) model two simulations statistically Localized Constructed Analogs (LOCA). uniquely separate causes of differences between based future climate projections into in (gridded observations versus regional output) how these downscaling techniques explicitly handle changes (numerical modeling analogs). In methods,...
Abstract Ongoing (2014–16) drought in the state of California has played a major role depletion groundwater. Within California’s Central Valley, home to one world’s most productive agricultural regions, and increased groundwater occurs almost hand hand, but this relationship appears have changed over last decade. Data derived from 497 wells revealed continued lasting full year after drought, phenomenon that was not observed earlier records before twenty-first century. Possible causes include...
Abstract In response to greenhouse gas forcing, most coupled global climate models project the tropical Pacific SST trend toward an “El Niño–like” state, with a reduced zonal gradient and weakened Walker circulation. However, observations over last five decades reveal more “La Niña–like” state strengthening gradient. Recent research indicates that identified differences are unlikely be entirely due internal variability probably result, at least in part, from systematic model biases. this...
Abstract Amplified and persistent ridges in western North America are recurring features associated with drought conditions California. The recent event (2012–2016) lasted through both La Niña El Niño episodes, suggesting additional climate drivers important addition to the commonly perceived Niño‐Southern Oscillation. Diagnostic analyses presented here suggest that, while Pacific American (PNA) Oscillation (NPO) do not directly cause California, relationships between them upper air...
Abstract In January 2016, a robust reversal of the Arctic Oscillation took place associated with rapid tropospheric warming in region; this was followed by occurrence classic sudden stratospheric March. The succession these two distinct events provides stimulating opportunity to examine their characteristics terms similarities and differences. Historical cases types were identified validated based upon tropical linkages Madden‐Julian El Niño as documented previous studies. analysis indicates...
Abstract The timing of active‐phase East Asian summer monsoon (Meiyu) undergoes a marked shift since 1979. Diagnostic analysis indicates that active convection over Taiwan has occurred later in the season, from late May to early June, with tendency increasingly intense rainfall. This results southward migration Meiyu rainband, driven by an upper‐level cyclonic anomaly eastern China and lower‐level anticyclonic subtropical Western Pacific. Together, these two circulation patterns enhance both...
Tropical-extratropical teleconnection during boreal summer is characterized by a circumglobal (CGT) pattern and often considered as one of the major predictability sources extratropical atmospheric circulation. The extent to which remotely forced tropical sea surface temperature (SST) variability remains be elucidated. Here, we use suite pacemaker simulations from Community Earth System Model (CESM1) investigate contribution in Eastern Tropical Pacific, Northern Atlantic, Indo-Western...
Abstract Regional hydrological sensitivity (i.e., precipitation change per degree local surface warming) contributes substantially to the uncertainty in future projections over tropical oceans. Here, we investigate of relative (P*, divided by basin average precipitation) sea temperature (SST) dissecting it into three components, namely P* SST (SST rel , minus mean SST) changes, convergence and gradient changes. We show that relationships between P*, convergence, gradients are largely...
In the Western North Pacific (WNP), atmospheric low-level convergence is one of main factors that influences genesis tropical cyclones (TC). It has been observed timing seasonal maxima in and TC shifted since mid-1990s from mid-August to late-July, with this shift having also affected number TC. A multidecadal frequency 20 years was revealed variation intraseasonal oscillation (ISO) Pacific, which a weak WNP spring may trigger an advanced ISO phase summer vice versa. The present diagnostic...
Abstract This study assesses the impact global climate change has had on theoretical upper limit of precipitation for Utah's watersheds by examining historical trends in probable maximum (PMP), a metric widely used dam construction and management. Trends factors PMP driven both frontal monsoonal storm scenarios were studied using two networks surface weather stations modern gridded datasets spanning 1981–2018. It was found that trend 3‐hr 24‐hr estimations exhibited statistically significant...