Severe Precipitation in Northern India in June 2013: Causes, Historical Context, and Changes in Probability Deepti Singh, Daniel E. Horton, Michael Tsiang, Matz Haugen, Moetasim Ashfaq, Rui Mei, Deeksha Rastogi, Nathaniel C. Johnson, Allison Charland, Bala Rajaratnam and Noah S. Diffenbaugh* Supplementary Methods: S1: Datasets For the precipitation analysis, we use the 1x1 gridded daily dataset from the Indian Meteorological Department (IMD) (Rajeevan et al. 2006, 2010). This dataset is developed from approximately 2140 rain-gauge stations over India, and has been extensively used in literature to study the Indian Monsoon characteristics (Dash et al. 2009; Ghosh et al. 2012; Singh 2013). As shown in Fig. 1a of Rajeevan et al. (2006), all stations included in the development of this dataset have at least 90% data availability within the observational period. Daily atmospheric variables including geopotential heights, atmospheric winds, and – specific humidity are obtained from the National Center for Environment – Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis (R1) datasets at 2.5x2.5 spatial resolution (Kalnay et al. 1996). In order to match the period of record of the IMD precipitation dataset, we analyze the 1951-2013 period in the reanalysis.
Severe Precipitation in Northern India in June 2013: Causes, Historical Context, and Changes in Probability Deepti Singh, Daniel E. Horton, Michael Tsiang, Matz Haugen, Moetasim Ashfaq, Rui Mei, Deeksha Rastogi, Nathaniel C. Johnson, Allison Charland, Bala Rajaratnam and Noah S. Diffenbaugh* Supplementary Methods: S1: Datasets For the precipitation analysis, we use the 1x1 gridded daily dataset from the Indian Meteorological Department (IMD) (Rajeevan et al. 2006, 2010). This dataset is developed from approximately 2140 rain-gauge stations over India, and has been extensively used in literature to study the Indian Monsoon characteristics (Dash et al. 2009; Ghosh et al. 2012; Singh 2013). As shown in Fig. 1a of Rajeevan et al. (2006), all stations included in the development of this dataset have at least 90% data availability within the observational period. Daily atmospheric variables – including geopotential heights, atmospheric winds, and specific humidity – are obtained from the National Center for Environment Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis (R1) datasets at 2.5x2.5 spatial resolution (Kalnay et al. 1996). In order to match the period of record of the IMD precipitation dataset, we analyze the 1951-2013 period in the reanalysis.
BAMS_2013_India_Supplemental_revised_SUBMITTED.docx