Journal
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
Volume 114, Issue -, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2008JD010873
Keywords
-
Categories
Funding
- National Science Foundation [OPP02300284, ANT 07-32656]
- NASA OVWST [1285663, JPLCIT-1216483]
Ask authors/readers for more resources
A wavelet-based method is described for incorporating swaths of surface pressure derived from scatterometer measurements into surface pressure analyses obtained from the European Centre for Medium-range Weather Forecasts (ECMWF). The resulting modified pressure fields are used to identify low-pressure centers over the Southern Ocean and to build statistics of midlatitude cyclones during 7 years of the SeaWinds-on-QuikSCAT operational period (July 1999 to June 2006). The impact of the scatterometer-derived pressure swaths is assessed with a statistical analysis of cyclone characteristics (central pressure, radius, depth) performed in parallel on the ECMWF and on the modified pressure fields. More low-pressure centers (5-10% depending on the season) are identified with the modified pressure fields, in particular incipient lows captured earlier than ECMWF and more short-lived mesoscale cyclones (with a life span less than 4 days). The cyclones identified with the modified pressure fields are characterized by lower central pressure and tighter isobars on average. A parallel spectral analysis reveals similar to 1% additional energy at scales less than 2000 km in the modified pressure fields.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available