How does rising atmospheric CO2 affect marine organisms?

Click to locate material archived on our website by topic

Global Historical Climatology Network (GHCN)
Temperature Calculations

For a description of the GHCN data set, visit the National Climatic Data Center's website (

To calculate a trend, input a period of record, a latitude range and a longitude range.  If you are unsure how and what to enter for these terms, click here.  Results will be returned in approximately 10 to 20 seconds after you have entered these parameters and clicked on the "Calculate trend" button below.

Beginning Year: Ending Year:
Southernmost Latitude: Northernmost Latitude:
Westernmost Longitude: Easternmost Longitude: