HIRS channel 12 brightness temperature dataset and its correlations with major climate indices 1National Climatic Data Center, National Oceanic and Atmospheric Administration, Asheville, North Carolina, USA
23 Jul 2013
2Cooperative Institute for Climate and Satellites, North Carolina State University, Asheville, North Carolina, USA
3Met Office Hadley Centre, Exeter, UK
Received: 30 Nov 2012 – Published in Atmos. Chem. Phys. Discuss.: 21 Dec 2012Abstract. A new version of the High-Resolution Infrared Radiation Sounder (HIRS) upper
tropospheric water vapor channel (channel 12) brightness temperature dataset
is developed using intersatellite calibrated data. In this dataset, only
those pixels affected by upper tropospheric clouds are discarded. Compared
to the previous version that was based on column-clear-sky data, the new
version has much better daily spatial coverage. The
HIRS observation patterns are compared to microwave sounder measurements.
The differences between the two types of sounders vary with respect to
brightness temperature with larger differences for higher (dry) values.
Correlations between the HIRS upper tropospheric water vapor channel
brightness temperatures and several major climate indices show strong
signals during cold seasons. The selected climate indices track climate
variation signals covering regions from the tropics to the poles.
Qualitatively, moist signals are correlated with troughs and ascending
branches of the circulation, while dry signals occur with ridges and
descent. These correlations show the potential of using the upper
tropospheric water vapor channel brightness temperature dataset together
with a suite of many atmospheric variables to monitor regional climate
changes and locate global teleconnection patterns.
Revised: 07 Jun 2013 – Accepted: 11 Jun 2013 – Published: 23 Jul 2013
Citation: Shi, L., Schreck III, C. J., and John, V. O.: HIRS channel 12 brightness temperature dataset and its correlations with major climate indices, Atmos. Chem. Phys., 13, 6907-6920, doi:10.5194/acp-13-6907-2013, 2013.