Upper Air ReportJanuary 2001

Global Lower Tropospheric Anomalies, January 2001
larger image		 Data collected by NOAA's TIROS-N polar-orbiting satellites and adjusted for time-dependent biases by NASA and the Global Hydrology and Climate Center at the University of Alabama in Huntsville indicate that January global temperatures in the lower half of the atmosphere (lowest 8 km) were the 10th coolest (-0.08C below average) since satellite measurements began in 1979. Temperatures were the coldest on record in January 2000. The average lower tropospheric temperature in the Northern Hemisphere was near the long-term average, while the Southern Hemisphere temperature was -0.15C (-.27F) below the 1979-1998 average.

Citing This Report

NOAA National Centers for Environmental Information, Monthly Upper Air Report for January 2001, published online February 2001, retrieved on July 25, 2025 from https://www.ncei.noaa.gov/access/monitoring/monthly-report/upper-air/200101. DOI: https://www.ncei.noaa.gov/access/metadata/landing-page/bin/iso?id=gov.noaa.ncdc:C00762