This series of charts includes global analyses of surface
and near-surface air temperature as well as links to data for specific
stations. Select desired field
from menu at left.
Data for these analyses was obtained from the US National Centers for
Environmental Prediction, Climate Prediction Center.
Aids to interpreting plots:
||The long-term average of a given variable, often the 30-year period
||The difference between the observed value of a variable and its climatological
||An abbreviastion for "Outgoing Longwave Radiation". Anomalies
in OLR can be related to cloud cover and precipitation. Negative
OLR anomalies generally indicate increased cloudiness and likelihood
of precipitation while positive anomalies imply decreased cloudiness.
The relationship between OLR anomalies and precipitation holds most
strongly in tropical regions.
||A 5-day average of a variable, starting from 1-5 Jan, 6-10 Jan, ...,
27-31 Dec. On plots using pentad data, the date for the "middle"
of the pentad is displayed: 3 Jan, 8 Jan, ... , 29 Dec.
||Percentiles represent a ranking of the data over a given base period.
Data in the zeroth percentile have the lowest value in the base period
while those at the hundreth percentile have the highest value during the
base period. On some plots the percentiles are displayed from 0 to
1 (the percentiles are divided by 100).