Eric Nelkin

TL;DR: The TRMM Multi-Satellite Precipitation Analysis (TMPA) as discussed by the authors provides a calibration-based sequential scheme for combining precipitation estimates from multiple satellites, as well as gauge analyses where feasible, at fine scales.

TL;DR: The Global Precipitation Climatology Project (GPCP) version 2 Monthly Precise Analysis as discussed by the authors is a merged analysis that incorporates precipitation estimates from low-orbit satellite microwave data, geosynchronous-orbit-satellite infrared data, and rain gauge observations.

TL;DR: In this article, the authors review the conceptual basis for the TMPA, summarize the processing sequence, and focus on two new activities: real-time and post-real-time TMPA.

TL;DR: The new Version 2.3 of the GPCP Monthly analysis is described in terms of changes made to improve the homogeneity of the product, especially after 2002, and the general La Nina pattern for 2017 is noted and the evolution from the early 2016 El Nino pattern is described.

Abstract: 28 April 2015 NOAA reprocessed the global IR data for 10 UTC 26 April through 14 UTC 27 April due to dropped images, however there is no straightforward way to re-do the Early and Late Runs, so that period should display somewhat lower quality in the regions that lack IR input. 17 April 2015 IMERG Early and Late Runs ceased when CPC Global 4 km Merged IR data dropped out, starting 17 UTC 14 April due to processing issues at NOAA, and were caught up after the data returned around 11 UTC 17 April. 8 April 2015 End of TMI data 1 April 2015 Initial release of IMERG Late Run (V03D); beta release of Day-1 IMERG Early Run. 13 March 2015 Beta release of Day-1 IMERG Late Run. 20 January 2015 Revised release of IMERG Final Run (V03D). 16 January 2015 Initial release retracted due to minor inconsistencies in “missing” values. 15 January 2015 Initial release of IMERG Final Run (V03D). 4 December 2014 Beta release of Day-1 IMERG Final Run for Early Adopters.