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RISThe Impact of Cloud Feedbacks on Arctic Climate under Greenhouse Forcing
Publisher: American Meteorological Society
Abstract: The simulation of Arctic cloud cover and the sensitivity of Arctic climate to cloud changes are investigated using an atmosphere?mixed-layer ocean GCM (GENESIS2). The model is run with and without changes in three-dimensional ...
An Improved Parameterization for Simulating Arctic Cloud Amount in the CCSM3 Climate Model
Publisher: American Meteorological Society
Abstract: A simple alternative parameterization for predicting cloud fraction in the Community Climate System Model, version 3 (CCSM3) global climate model is presented. This formula, dubbed ?freeezedry,? is designed to alleviate ...
A Mechanism for Abrupt Climate Change Associated with Tropical Pacific SSTs
Publisher: American Meteorological Society
Abstract: The tropical Pacific?s response to transiently increasing atmospheric CO2 is investigated using three ensemble members from a numerically efficient, coupled atmosphere?ocean GCM. The model is forced with a 1% yr?1 increase ...
The Role of Ice Cover in Heavy Lake-Effect Snowstorms over the Great Lakes Basin as Simulated by RegCM4
Publisher: American Meteorological Society
Abstract: 20-km regional climate model, the Abdus Salam International Centre for Theoretical Physics Regional Climate Model version 4 (ICTP RegCM4), is employed to investigate heavy lake-effect snowfall (HLES) over the Great Lakes ...
Global Vegetation and Climate Change due to Future Increases in CO2 as Projected by a Fully Coupled Model with Dynamic Vegetation
Publisher: American Meteorological Society
Abstract: Transient simulations are presented of future climate and vegetation associated with continued rising levels of CO2. The model is a fully coupled atmosphere?ocean?land?ice model with dynamic vegetation. The impacts of the ...
Dynamically Downscaled Projections of Lake-Effect Snow in the Great Lakes Basin
Publisher: American Meteorological Society
Abstract: rojected changes in lake-effect snowfall by the mid- and late twenty-first century are explored for the Laurentian Great Lakes basin. Simulations from two state-of-the-art global climate models within phase 5 of the Coupled ...
Rethinking Tropical Ocean Response to Global Warming: The Enhanced Equatorial Warming
Publisher: American Meteorological Society
Abstract: The response of tropical Pacific SST to increased atmospheric CO2 concentration is reexamined with a new focus on the latitudinal SST gradient. Available evidence, mainly from climate models, suggests that an important ...
Changing Seasonal Predictability of Arctic Summer Sea Ice Area in a Warming Climate
Publisher: American Meteorological Society
Abstract: AbstractWe use a large ensemble set of simulations and initialized model forecasts to assess changes in the initial-value seasonal predictability of summer Arctic sea ice area from the late-twentieth to the mid-twenty-first ...
Simulation of Heavy Lake-Effect Snowstorms across the Great Lakes Basin by RegCM4: Synoptic Climatology and Variability
Publisher: American Meteorological Society
Abstract: historical simulation (1976?2002) of the Abdus Salam International Centre for Theoretical Physics Regional Climate Model, version 4 (ICTP RegCM4), coupled to a one-dimensional lake model, is validated against observed lake ...
Relationships between Arctic Sea Ice and Clouds during Autumn
Publisher: American Meteorological Society
Abstract: The connection between sea ice variability and cloud cover over the Arctic seas during autumn is investigated by analyzing the 40-yr ECMWF Re-Analysis (ERA-40) products and the Television and Infrared Observation Satellite ...