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RISThe Role of Natural Climate Variability in Recent Tropical Expansion
Publisher: American Meteorological Society
Abstract: AbstractObservations show the tropical belt has widened over the past few decades, a phenomenon associated with poleward migration of subtropical dry zones and large-scale atmospheric circulation. Coupled climate models ...
Trends in Twentieth-Century Temperature Extremes across the United States
Publisher: American Meteorological Society
Abstract: A long-term, homogeneous set of daily maximum and minimum temperature data representing a subset of daily U.S. Historical Climatology Network stations is used to analyze trends in extreme temperature occurrence across the ...
Utility of Radiosonde Wind Data in Representing Climatological Variations of Tropospheric Temperature and Baroclinicity in the Western Tropical Pacific
Publisher: American Meteorological Society
Abstract: The utility of the thermal wind equation (TWE) in relating tropospheric (850?300 hPa) wind and temperature on climatological time scales is assessed, based on data from 59 radiosonde stations in the western tropical Pacific ...
Forcing of the Arctic Oscillation by Eurasian Snow Cover
Publisher: American Meteorological Society
Abstract: hroughout much of the latter half of the twentieth century, the dominant mode of Northern Hemisphere (NH) extratropical wintertime circulation variability?the Arctic Oscillation (AO)?exhibited a positive trend, with ...
A Method to Adjust Long-Term Temperature Extreme Series for Nonclimatic Inhomogeneities
Publisher: American Meteorological Society
Abstract: A method to homogenize nonclimatic discontinuities in temperature extreme exceedence series is developed and evaluated. The method is based on a set of complementary tests with the application of an individual test depending ...
A Homogenized Historical Temperature Extreme Dataset for the United States
Publisher: American Meteorological Society
Abstract: A subset of stations from the daily U.S. Historical Climatology Network (HCN) is used as a basis for a historical database of temperature extreme occurrence in the United States. The dataset focuses on daily temperature ...
Interhemispheric Aerosol Radiative Forcing and Tropical Precipitation Shifts during the Late Twentieth Century
Publisher: American Meteorological Society
Abstract: hrough the latter half of the twentieth century, meridional shifts in tropical precipitation have been associated with severe droughts. Although linked to a variety of causes, the origin of these shifts remains elusive. ...
Robust Tropospheric Warming Revealed by Iteratively Homogenized Radiosonde Data
Publisher: American Meteorological Society
Abstract: Results are presented from a new homogenization of data since 1959 from 527 radiosonde stations. This effort differs from previous ones by employing an approach specifically designed to minimize systematic errors in ...
The Modification of Sea Surface Temperature Anomaly Linear Damping Time Scales by Stratocumulus Clouds
Publisher: American Meteorological Society
Abstract: tratocumulus (Sc) cloud cover is a persistent feature of the subtropical North and South Atlantic. It is well known that Sc cloud cover increases with decreasing temperatures of the underlying sea surface and that an ...
Recent Tropical Expansion: Natural Variability or Forced Response?
Publisher: American Meteorological Society
Abstract: Previous studies have documented a poleward shift in the subsiding branches of Earth?s Hadley circulation since 1979 but have disagreed on the causes of these observed changes and the ability of global climate models to ...