Global Analysis - January 2004


Global Highlights:

  • Based on preliminary data for January 2004, global average combined land and sea surface temperature was fourth warmest on record
  • Temperatures were much above average across most of Asia, western Europe and South America with below average temperatures across the northeastern U.S., Alaska and Central America
  • Precipitation during January 2004 was above average across Europe, Brazil and Malaysia with drier than average conditions across the northeastern U.S., Japan and Mozambique
  • Slightly warmer than normal SSTs remained across the equatorial Pacific basin but do not indicate that the warm episode will transition into an El Niño event.
 

Contents of this Section:

This is a break in the document The data presented in this report are preliminary. Ranks and anomalies may change as more complete data are received and processed. The most current data may be accessed via the Global Surface Temperature Anomalies page. This is a break in the document

Top of Page Introduction

The two maps below utilize different base periods and may reflect different anomaly values of land surface temperatures. The dot map on the left uses anomalies that were calculated from the Global Historical Climatology Network (GHCN) data set of land surface stations using a 1961-1990 base period. The map on the right is a blended product which uses satellite and surface anomaly values of measured land and ocean temperatures as well as SSTs with the base period of 1988-2004. Both maps indicate above average temperatures in western Europe, South America and much of Asia while cooler than average temperatures covered much of Canada, Alaska and the eastern U.S, as well as Australia and eastern Europe.

The mean position of upper level ridges of high pressure and troughs of low pressure (depicted by positive and negative 500 millibar height anomalies) are generally reflected by areas of positive and negative temperature anomalies at the surface, respectively. For all Global map products see the Climate Monitoring Global Products page.
Click here for SSM/I blended temperature map
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Click here for Temperature Dot Map
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January Anomaly Rank Warmest Year on Record
Global
Land
Ocean
Land and Ocean
+0.81°C (+1.46°F)
+0.43°C (+0.77°F)
+0.54°C (+0.97°F)
8th warmest
3rd warmest
4th warmest
2002 (+0.1.42°C/2.56°F)
1998 (+0.54°C/0.97°F)
2002 (+0.73°C/1.31°F)
Northern Hemisphere
Land and Ocean
+0.64°C (+1.15°F) 4th warmest 2002 (+0.92°C)
Southern Hemisphere
Land and Ocean
+0.48°C (+0.86°F) 6th warmest 1998 (+0.61°C)
90N-20N
Land and Ocean
+0.69°C (+1.24°F) 7th warmest 2002 (+1.21°C)
20N-20S
Land and Ocean
+0.61°C (+1.10°F) 4th warmest 1998 (+1.00°C)

Click here for Global Land and Ocean Triad plot
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Click here for Global Hemisphere Triad plot
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The most current data may be accessed via the Global Surface Temperature Anomalies page.

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Top of Page Precipitation

The dot maps below represent anomaly values based on the GHCN data set of land surface stations using a base period of 1961-1990. The map on the left is precipitation anomalies measured in millimeters, the map on the right is the percentage of average precipitation as defined by the base period. During January 2004, much above average precipitation fell across the Mississippi Valley in the U.S., most of Europe, Malaysia, most of Brazil and eastern Australia. Below average precipitation was observed in Alaska, northeastern U.S., Argentina, Portugal and Spain.
Click here for Precipitation Dot map in Millimeters
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Click here for Percent Precipitation Dot map
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The satellite images below were acquired from the SSM/I satellite using a base period of 1988-2004. The map on the left reflects surface liquid wetness conditions, while the map on the right reflects snow cover conditions for the month. Snow covered areas that are normally snow-free during this month will be appear drier than average on the wetness image since a wetness value cannot be determined for regions that are normally snow covered. Data in these areas that are normally snow covered are displayed as missing. This is due to the snow crystalline structure which produces a considerable amount of scatter and makes it difficult for the SSM/I to accurately read the surface conditions. The SSM/I products are experimental and are under continuing review and development. Additional data and information can be found on the SSM/I Browser.

Click here for SSM/I Wetness map
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Click here for SSM/I snowcover map
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Top of Page ENSO SST Analysis

Click Here for the last week of the month's ENSO condtions Map
Click here for animated loop
  • Although sea surface temperatures were slightly above average over much of the equatorial Pacific (as shown in the adjacent animation of weekly sea surface temperature anomalies), a consensus of indices does not indicate a transition into an El Niño event. A comprehensive summary of January 2004 ENSO conditions can be found on the ENSO monitoring page. For the latest advisory on ENSO conditions go to NOAA's Climate Prediction Center (CPC) and the CPC ENSO Diagnostic Discussion
  • Images of sea surface temperature conditions are available for all months to date during 2004 at the weekly SST page

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References:

Peterson, T.C. and R.S. Vose, 1997: An Overview of the Global Historical Climatology Network Database. Bull. Amer. Meteorol. Soc., 78, 2837-2849.

Citing This Report

NOAA National Climatic Data Center, State of the Climate: Global Analysis for January 2004, published online February 2004, retrieved on November 27, 2014 from http://www.ncdc.noaa.gov/sotc/global/2004/1.