GFDL - Geophysical Fluid Dynamics Laboratory

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GFDL Research Highlights

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February 15, 2013 - Controls of Global Snow Under Climate Change
Understanding snowfall variability is key to understanding future water supply in snowmelt-dominated regions, like the western U.S. This research validated GFDL’s coupled climate models, CM2.5 and CM2.1, for snowfall and explored changes in snowfall in a future climate experiment, to determine if resolution differences in the models influence snowfall signals. Read more...

February 1, 2013 - Contributions of Downstream Eddy Development to the Teleconnection between ENSO and the Atmospheric Circulation over the North Atlantic
El Nino-Southern Oscillation (ENSO) is the dominant pattern of interannual climate variability, and has strong influence on the atmospheric circulation around the globe. North Atlantic Oscillation (NAO) is another prominent mode of interannual variability in the Northern Hemisphere extratropics, and exerts a strong influence on the climate of the North Atlantic basin and the surrounding land areas. The main purpose of this study is to describe and assess of the interactions between these two prominent teleconnection patterns of the interannual climate variability. Read more...

January 21, 2013 - Springtime high surface ozone events over the western United States: Quantifying the role of stratospheric intrusions
Stratosphere-to-troposphere transport of ozone is a common occurrence at mid- and high latitudes, but its influence on tropospheric ozone levels remains a long-standing question, despite decades of research. GFDL scientists and colleagues analyzed balloon soundings, lidar, surface and satellite measurements using GFDL’s new global high-resolution chemistry-climate model, to look at the extent to which naturally occurring stratospheric ozone intrusions reach the surface and affect air quality. Read more...

January 14, 2013 - Have Aerosols Caused the Observed Atlantic Multi-decadal Variability?
Identifying the main drivers of the twentieth-century multi-decadal variability in the Atlantic Ocean is crucial for predicting how the Atlantic will evolve in the coming decades and the resulting broad impacts on weather and precipitation patterns around the globe. Another recently published paper suggested that aerosols are a prime driver of twentieth-century North Atlantic climate variability, based on simulations using the HadGEM2-ES (UK Met Office Hadley Centre Earth System Model). Read more...

January 8, 2013 - Cusk (Brosme brosme) and climate change: assessing the threat to a candidate marine fish species under the U.S. Endangered Species Act
This collaboration, led by NOAA and EPA scientists and entraining expertise from the University of Connecticut, evaluated the potential effects of climate change on cusk (Brosme brosme) in the Northwest Atlantic. Numbers of this demersal (bottom-dwelling) fish (Fig. 1) on the Northeast Atlantic continental shelf have declined dramatically over the past several decades. This is believed to be primarily a result of fishing activities. However, changes in the distribution and abundance of a number of marine fish stocks in the Northwest Atlantic have been linked to climate variability and change, suggesting that both fishing and climate may affect the future status of cusk. Read more...

November 28, 2012 - Connecting changing ocean circulation with changing climate
Our capability to observe ocean changes has improved dramatically over the past two decades, motivating interest in how these observations can be used to constrain climate change simulations. Projections of future surface climate change and ocean circulation change are both very uncertain. This research shows that circulation changes are important to the surface climate change and we describe a mechanism for the connection. Read more...

August 24, 2012 - Mixing of dust and NH3 observed globally over anthropogenic dust sources
Dust is one of the most abundant aerosols in the atmosphere, and by scattering and absorbing solar radiation, it affects climate. Anthropogenic dust is largely ignored in most current climate studies. We show how pervasive it is throughout the world, and that it is mostly associated with croplands. Read more...

August 17, 2012 - Global scale attribution of anthropogenic and natural dust sources and their emission rates based on MODIS Deep Blue aerosol products
Dust is one of the most abundant aerosols in the atmosphere, and by scattering and absorbing solar radiation, it affects climate. In particular, anthropogenic dust is a significant source of radiative forcing on the climate system. Increasing numerical resolution of climate models provides an opportunity to create a realistic, high-resolution dust-source inventory. Read more...

August 10, 2012 - Global calcite cycling constrained by sediment preservation controls
The primary objective of this work was to build a set of internally consistent and computationally efficient algorithms to represent the regionally varying production, water column dissolution, and sediment preservation of pelagic calcite, and analyze the biogeochemical implications. Read more...

August 3, 2012 - Northern high latitude heat budget decomposition and transient warming
The future response of Atlantic meridional overturning circulation (AMOC) to increased carbon dioxide is known to be uncertain, with models showing 21st century weakening of 0 to 50%, according to the IPCC 4th report. Read more...

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