Synoptic climatology of Northern Hemisphere available potential energy collapses

A Climatology of Northern Hemisphere Blocking

In this paper a 55-yr (1948–2002) Northern Hemisphere blocking climatology is presented. Traditional blocking indices and methodologies are revised and a new blocking detection method is designed. This algorithm detects blocked flows and provides for a better characterization of blocking events with additional information on blocking parameters such as the location of the blocking center, the i...

Synoptic Climatology: An Overview

Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium.

Late Holocene climate in western North America was punctuated by periods of extended aridity called megadroughts. These droughts have been linked to cool eastern tropical Pacific sea surface temperatures (SSTs). Here, we show both short-term and long-term climate variability over the last 1,500 y from annual band thickness and stable isotope speleothem data. Several megadroughts are evident, in...

A climatology based on reanalysis of baroclinic developmental regions in the extratropical northern hemisphere.

Regions of the occurrence of different phenomena related to the development of baroclinic disturbances are reviewed for the Northern Hemisphere extratropics, using National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis data. The occurrence of height lows appears to be related to the orography near the earth's surface and with surface- and upper-air cyc...

01 Southern Hemisphere Tropical Cyclone Climatology