Decadal fluctuations in salinity, nutrients, chlorophyll, a variety of zooplankton taxa, and fish stocks in the Northeast Pacific are often poorly correlated with the most widely-used index of large-scale climate variability in the region - the Pacific Decadal Oscillation (PDO). We define a new ...
The Pacific North American oscillation (PNA) is an alternating pattern between pressures in the central Pacific Ocean and centers of action over western Canada and the southeastern United States. The PNA is associated with a Rossby wave pattern and refers to the relative amplitudes of the ridge ...
when calculating a summertime North Pacific Subtropical High Intensity index (see “Methods”), we find that the surface circulation is the weakest it has been in the last 40 years (Fig.2b). The significant interannual correlation between the North Pacific High Intensity index and JJA-averaged ...
Decadal fluctuations in salinity, nutrients, chlorophyll, a variety of zooplankton taxa, and fish stocks in the Northeast Pacific are often poorly correlated with the most widely-used index of large-scale climate variability in the region - the Pacific Decadal Oscillation (PDO). We define a new ...
The present study addresses the variability of Northern Hemispheric Hadley circulation and North Pacific Oscillation (NPO) in winter and their relationship, employing NCEP/NCAR data for the period 1954~2003. In this research, the index for Hadley circulation intensity is defined as the maximum ...
Variability and Changes in the North Atlantic Oscillation Index KeywordsInternal variability-External forcing-North Atlantic Oscillation index-Temperaturedoi:10.1007/978-94-007-1372-7_2Tim J. Osborn... TJ Osborn 被引量: 32发表: 2011年 Historical forcings as main drivers of the Atlantic multidecadal...
e North Atlantic Oscillation (NAO) index defined as the difference in normalized DJFM sea level pressure between the model grid points closest to Lisbon, Portugal and Stykkisholmur, Iceland. f Labrador Sea surface heat flux (SHF; W/m2), with negative values indicating heat loss from the ...
The impact of the previous winter (D−1JF0) El Niño-Southern Oscillation (ENSO) has been removed from the MAM0 NTA SST index using linear regression with respect to the Niño3.4 index. Only 850-hPa winds and SST anomalies significant at the 95% confidence level are shown. Full size...
We present here a 947-year-long multidecadal North Atlantic Oscillation (NAO) reconstruction and find a persistent positive NAO during the MCA. Supplementary reconstructions based on climate model results and proxy data indicate a clear shift to weaker NAO conditions into the Little Ice Age (LIA)....
[1] The variability of North Pacific Oscillation (NPO) and the associated atmospheric circulation in the boreal winter are studied with the HadSLP2, the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR), and the ECMWF 40-year reanalysis (ERA-40) ...