Details

Autor(en) / Beteiligte

• Shepherd, J.M.
• Grundstein, A.J.
• Mote, T.L.

Titel

An analysis of seasonal biases in satellite and reanalysis rainfall products in the Savannah River basin

Ist Teil von

• Physical geography, 2014-05, Vol.35 (3), p.181-194

Ort / Verlag

Abingdon: Taylor & Francis

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Satellite-based precipitation data are a viable source of information in data-sparse regions and are particularly valuable for hydrological modelling applications. Several studies of satellite-based precipitation focus on monthly or greater timescales, but a relatively fewer number have been done on the daily or sub-daily scales. Also, biases in satellite-based precipitation data are often region-specific and such information is important for quantifying input errors in hydrological models. Our study builds upon these needs by examining biases in daily precipitation data for a watershed in the southeastern United States. We observed biases that occur seasonally and by magnitude. Seasonally, precipitation correlates well in most seasons but summer, likely due to the sporadic nature of convective precipitation that is a common precipitation mechanism in this region during the summer. Daily precipitation biases are around 5 mm, but the sign of the bias varies by season, with positive biases in all seasons but fall. Additionally, we found that satellite-based data tend to overestimate light precipitation relative to the multi-gauge average, which more often records no precipitation.