The aim of this work is the estimation and the analysis of precipitable water in the middle-upper troposphere (850 hPa–300 hPa), obtained through Meteosat-8/-9 tropospheric humidity products, together with air temperature data, from NCEP/NCAR daily global reanalysis 1. The period of observation goes from 1st February 2004 to 30th November 2008, on a regular grid of 2.5° × 2.5° resolution, over Meteosat-8/-9 area, included between about 63°N–63°S of latitude and between about 63°W–63°E of longitude.Daily averages of tropospheric humidity products have been checked with two data sets: the first one was vertically averaged relative humidity from 97 Integrated Global Radiosonde Archive (IGRA) stations, the second one was relative humidity averaged from NCEP/NCAR daily global reanalysis 1. These comparisons have shown an underestimation of Meteosat relative humidity data respect the radiosounding data, in particular in the middle layer (850–600 hPa).Estimated middle-upper tropospheric precipitable water has shown a general coherence with typical climatological values representing about 30–45% of whole precipitable water in the same area. Linear trends for middle-upper troposphere shows values comprised between − 1.0 kg m− 2 yr− 1 and 0.2 kg m− 2 yr− 1, with bigger values (up to − 1.6 kg m− 2 yr− 1) mainly in the equatorial area, over South America. Hovmöller analysis underline mainly the middle-upper precipitable water seasonality with maximum values oscillating around the equator, following ITCZ migration, more marked over land than over the Ocean, from North to South.

Upper and middle precipitable water calculated from METEOSAT-8/-9 tropospheric humidity and NCEP/NCAR temperatures / Malmusi, Simona; Boccolari, Mauro. - In: ATMOSPHERIC RESEARCH. - ISSN 0169-8095. - STAMPA. - 95:(2010), pp. 8-18. [10.1016/j.atmosres.2009.08.010]

Upper and middle precipitable water calculated from METEOSAT-8/-9 tropospheric humidity and NCEP/NCAR temperatures

MALMUSI, Simona;BOCCOLARI, Mauro
2010-01-01

Abstract

The aim of this work is the estimation and the analysis of precipitable water in the middle-upper troposphere (850 hPa–300 hPa), obtained through Meteosat-8/-9 tropospheric humidity products, together with air temperature data, from NCEP/NCAR daily global reanalysis 1. The period of observation goes from 1st February 2004 to 30th November 2008, on a regular grid of 2.5° × 2.5° resolution, over Meteosat-8/-9 area, included between about 63°N–63°S of latitude and between about 63°W–63°E of longitude.Daily averages of tropospheric humidity products have been checked with two data sets: the first one was vertically averaged relative humidity from 97 Integrated Global Radiosonde Archive (IGRA) stations, the second one was relative humidity averaged from NCEP/NCAR daily global reanalysis 1. These comparisons have shown an underestimation of Meteosat relative humidity data respect the radiosounding data, in particular in the middle layer (850–600 hPa).Estimated middle-upper tropospheric precipitable water has shown a general coherence with typical climatological values representing about 30–45% of whole precipitable water in the same area. Linear trends for middle-upper troposphere shows values comprised between − 1.0 kg m− 2 yr− 1 and 0.2 kg m− 2 yr− 1, with bigger values (up to − 1.6 kg m− 2 yr− 1) mainly in the equatorial area, over South America. Hovmöller analysis underline mainly the middle-upper precipitable water seasonality with maximum values oscillating around the equator, following ITCZ migration, more marked over land than over the Ocean, from North to South.
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Upper and middle precipitable water calculated from METEOSAT-8/-9 tropospheric humidity and NCEP/NCAR temperatures / Malmusi, Simona; Boccolari, Mauro. - In: ATMOSPHERIC RESEARCH. - ISSN 0169-8095. - STAMPA. - 95:(2010), pp. 8-18. [10.1016/j.atmosres.2009.08.010]
Malmusi, Simona; Boccolari, Mauro
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/625876
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