- Monthly Northern Hemisphere Sea-Level Pressure Grids, continuing from 1899
K.E. Trenberth, and D.A. Paolino, 1980: The Northern Hemisphere sea
level pressure data set: Trends, errors, and discontinuities. Mon.
Wea. Rev., 108, 855-872.
This dataset contains the longest continuous time series of monthly
gridded Northern Hemisphere sea-level pressure data in the DSS
archive. The 5-degree latitude/longitude grids, computed from the
daily grids in ds010.0 [http://rda.ucar.edu/datasets/ds010.0/],
begin in 1899 and cover the Northern Hemisphere from 15N to the
North Pole. The dataset continues to be updated regularly as new
data become available.
Each monthly grid is a simple average of all available daily grids
for the month. Prior to 1955, there is one grid per day. From July
1962 on, there are two grids each day. In the interim period, the
number of daily grids varies between one and two.
The grids for the period 1899-1977 were inspected and many
corrections were made by Kevin Trenberth of the Laboratory of
Atmospheric Research at the University of Illinois at
Champaign-Urbana, and these grids are included in this dataset. For
more information about these corrections, see the July 1980 issue of
Monthly Weather Review.
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