A5067110999- Arctic and Antarctic ice dynamics
- Methane Hydrates and Related Phenomena
- Climate change and permafrost
- Climate variability and models
- Cryospheric studies and observations
- Atmospheric and Environmental Gas Dynamics
- Geological Studies and Exploration
- Tropical and Extratropical Cyclones Research
- Ocean Waves and Remote Sensing
- Amphibian and Reptile Biology
- Marine and fisheries research
- Primate Behavior and Ecology
- Coral and Marine Ecosystems Studies
- Meteorological Phenomena and Simulations
- Geology and Paleoclimatology Research
- Wildlife Ecology and Conservation
Goddard Space Flight Center
2019-2024
Earth System Science Interdisciplinary Center
2021-2024
University of Maryland, College Park
2020-2024
Brown University
2017-2018
Princeton University
2015
John Brown University
2014
Abstract Identifying the mechanisms controlling timing and magnitude of snow accumulation on sea ice is crucial for understanding snow’s net effect surface energy budget sea-ice mass balance. Here, we analyze role cyclone activity seasonal buildup Arctic using model, satellite, in situ data over 1979–2016. On average, 44% variability monthly was controlled by snowfall 29% freeze-up. However, there were strong spatio-temporal differences. Cyclone comprised ~50% total Pacific compared to 83%...
Abstract In recent decades, the Arctic has experienced rapid atmospheric warming and sea ice loss, with an ice-free projected by end of this century. Cyclones are synoptic weather events that transport heat moisture into Arctic, have complex impacts on ice, local global climate. However, effect a changing climate cyclone behavior remains poorly understood. This study uses high resolution (4 km), regional modeling techniques downscaled reconstructions projections to examine how future...
In 2016, Antarctic sea ice experienced a regime shift when persisting decreasing trend emerged from relatively stable annual cycle. Drivers of the and future projections Southern Ocean remain unresolved. One possible contributing phenomena are atmospheric rivers (ARs), which long, narrow, transient features responsible for majority global poleward water vapor transport. Though infrequent over Antarctica, ARs wield substantial influence on mass balance. Previous studies highlight their...
Abstract Arctic sea ice has undergone significant change in areal coverage, thickness, type since the 1980s and more recently early 2000s, where a “New Arctic” regime now exists. Since modulates exchanges of energy from ocean to atmosphere, this changing environment profound effects on local climate. However, due Arctic's remote location, wide‐spread long‐term data records atmosphere are few far between. The Atmospheric Infrared Sounder (AIRS) onboard NASA's Aqua satellite was launched May...
Abstract Arctic cyclones are a fundamental component of climate, influencing atmospheric heat and moisture transport into the region surface energy, moisture, momentum fluxes. can also drive changes in sea ice energize ocean waves. Here we investigate record low level pressure (SLP) cyclone which formed East Greenland tracked NE over Barents Kara seas between 21 27 January 2022. At its peak intensity on 24 January, reached an estimated depth 932.2 mb at 79.5°N 20°E. North 70°N, this is...
Abstract Since the early 2000s, sea ice has experienced an increased rate of decline in thickness, extent and age. This new regime, coined ‘New Arctic’, is accompanied by a reshuffling energy flows at surface. Understanding magnitude nature this feedbacks therein remains limited. A novel database presented that combines satellite observations, model output, reanalysis data with parcel drift tracks Lagrangian framework. dataset consists daily time series locations, snow conditions,...
The drivers of rapid Arctic climate change—record sea ice loss, warming SSTs, and a lengthening the melt season—compel us to understand how this complex system operates use knowledge enhance predictability. Changing energy flows sparked by decline, spotlight atmosphere-surface coupling processes as central function its change response. Despite this, representation surface turbulent flux parameterizations in models has not kept pace with our understanding. large uncertainty projections, role...

 While primate trapping is a widely used field methodology, there are substantial health, safety and social risks to handling wild primates, necessitating sharing of best-practice methods minimize such risks. Yet, comprehensive capture-and-release protocols rarely published, updated even less frequently, despite advances that significantly elevate animal safety. Here, we propose modified capture release protocol for small primates demonstrate its effectiveness on free-ranging...
Abstract The Arctic is warming faster than anywhere on Earth, and with these temperatures, there likely to be more precipitation falling as rain. This phase change will have profound impacts the hydrologic cycle, energy balance, snow sea ice mass budgets. Here, we examine number of rainfall days in from three reanalyses, ERA-Interim, ERA5, MERRA-2, over 1980–2016. We show that has increased this period, predominantly autumn North Atlantic peripheral seas, length rain season all reanalyses....
Abstract. The Great Barrier Reef, the world’s largest coral reef ecosystem, is subject to many environmental stressors. This study utilizes remotely sensed Moderate Resolution Imaging Spectroradiometer (MODIS) chlorophyll a concentration data explore statistically significant relationships between local-scale tropical cyclone disturbance and relative water quality 2004–2014. reveals that activity reduces at 8- 16-day time lags. Relationships suggest early stages (during just after activity)...
Arctic cyclones are an integral part of the polar climate system. They import moisture and energy from midlatitude impact underlying surface through dynamic adn thermodynamic interactions. The rapid warming sea ice decline in makes it more important than ever to understand tightly coupled interactions between episodic weather events, such as cyclones.In this presentation, we use a Lagrangian parcel database study different strength have on Sea ice. includes daily 25km tracks associated...
The Arctic is warming four times faster than the rest of globe, with a concurrent rapid loss sea ice extent and thickness. Cyclones are synoptic weather events that transport heat moisture into Arctic, have complex impacts on ice, marine ecosystems, socio-economic activities. However, effect changing climate cyclone behavior remains poorly understood. This study uses combination reanalysis data, tracking techniques, high-resolution numerical modeling to explore recent future change across...
Since the 1970s, Arctic sea ice has undergone unprecedented change, becoming thinner, less extensive and resilient to summer melt. Snow's high albedo greatly reduces solar absorption in upper ocean, which mitigates sea-ice melt ocean warming. However, drivers of summertime snow depth variability are unknown. The Oscillation is a mode natural climate variability, influencing snowfall air temperatures. Thus, it may affect conditions on ice. Here we examine role 1980-2020 using atmospheric...
Abstract. Since the early 2000s, sea ice has experienced an increased rate of decline in thickness and extent transitioned to a seasonal cover. This shift thinner, 'New Arctic' is accompanied by reshuffling energy flows at surface. Understanding magnitude nature this feedbacks therein remains limited. A novel database presented that combines satellite observations, model output, reanalysis data with daily parcel drift tracks produced Lagrangian framework. dataset consists time series...