Sea Level Pressure Data from Columbia/GISS Regional Model Run. Names of files: slp.GISS.(SOURCE).(MONTH).(YEAR) Where: slp.GISS.(SOURCE).(MONTH).(YEAR) is the 2D monthly Sea level pressure (hPa) over the entire domain, (35W to 35E, 20S to 35N). slpday.GISS.(SOURCE).(MONTH).(YEAR) is the daily Sea level pressure (hPa) over the domain, (20W to 30E, 0 to 35N). SOURCE represents the source (NCEP, HADL) of boundary forcings. MONTH represents the month (MAY, JUN, JUL, AUG, SEP and OCT; 30-day month). YEAR is the year (2000, 2003, 2004 and 2005). Format of the daslp: Binary