ISLSCP II Reanalysis Near-Surface Meteorology Data The data are global near-surface meteorological parameters on a 1-degree global grid for the period 1986 to 1995. Temporal categories of data: time invariant and monthly mean annual cycle fields (together referred to as "fixed" fields); monthly mean fields; monthly-3-hourly (mean diurnal cycle) fields, and 3-hourly fields. Two types of variables exist in this data; instantaneous fields(primarily state variables), and average fields (primarily flux fields expressed as a rate). ############################################################################## File Name Convention -------------------- There are 136 compressed data files (.tar.gz) with this data set. The files include data with fixed, monthly, monthly-3-hourly (i.e. mean diurnal cycle), and 3-hourly temporal resolutions. All individual files provided in the compressed files are named using the following naming convention: N2_variable_1d_YYYYMMDD_hHH.asc Where N2- Stands for NCEP II. variable- This is the variable name (See below for listing). This can also include "_fixed" for time invariant fields, "_av" for average or mean, "_sd" for standard deviation, "_mn" for minimum, "_mx" for maximum, or "_in" for instantaneous data. _1d_- This identifies the spatial resolution of the data: "1d" for 1-degree in both latitude and longitude. YYYY- 4-digit year from 1986 to 1995. MM- 2-digit month from 01 to 12. DD- 2-digit day. A value of 00 means that the file is a monthly average. HH - 2-digit hour (GMT) from 03 to 24. Depending on the parameter, this can be the end of the measurement period or the value at the HH time (e.g.06 means this is either an average from 03 to 06, or an instantaneous value at 06, denoted by "_av" or "_in" in the filename). NOTE***: A value of 24 is either an average from 21 to 24 or a value at 24 GMT, where 24 is the start of the next day, or hour 00. The hour 00 is not used here. Also note that the hourly time stamps are not provided for monthly data. .asc- This is the file extension, indicating that the file is in the ASCII, or text, format. ################################################################# ASCII File Format ----------------- All of the files in the ISLSCP Initiative II data collection are in the ASCII format. The files contain 360 columns by 180 rows. Missing data are encoded as "-9.9900E+02". These files are gridded to a common 1 degree equal-angle lat/long grid, where the coordinates of the upper left corner of the files are located at 180 degrees W, 90 degrees N and the lower right corner coordinates are located at 180 degrees E, 90 degrees S. Data in the files are ordered from North to South and from West to East beginning at 180 degrees West and 90 degrees North. ############################################################################## Parameter Listing: refer to the companion file 1_ncep_met_doc.pdf for a complete listing of parameters and units. ----------------- Fixed Files ------------ There is one compressed file: N2_fixed_1d.tar.gz. This file contains 27 .asc data files for 5 variables.The individual files are named N2_variable_fixed_1d_mZZ.asc, where ZZ is either 00 for time invariant fields or the month from 01 to 12 for the monthly varying fixed fields. Monthly Files -------------- There are 6 compressed (.tar.gz) data files for 6 variables. When all 6 compressed files are extrapolated, there are 2,160 individual data files. The individual files are named N2_variable_av_1d_YYYYMMDD.asc, where MM is the month from 01 to 12,and DD= 00. Note that "av" stands for mean (average), but that part of the file name can also contain "sd" for standard deviation, "mn" for minimum, or "mx" for maximum. N2_snc_1d_monthly.tar.gz: When extrapolated, there are 12 files for each year, 1986-1995(120 total files). N2_snd_1d_monthly.tar.gz:When extrapolated, there are 12 files for each year, 1986-1995(120 total files). For the 4 compressed files below, when extrapolated, there are 48 files for each year, 1986-1995(480 total files). N2_sw10_1d_monthly.tar.gz N2_sw200_1d_monthly.tar.gz N2_t10_1d_monthly.tar.gz N2_t200_1d_monthly.tar.gz 3-Hourly Files --------------- There are 109 compressed (.tar.gz) data files. When extrapolated, the 109 compressed files contain a total of 286,692 individual.asc data files. Note: There are 10 files of each variable-1 file for each year, with the exception of 1 file (N2_dlw_...) which has only 9 years of data. The individual files are named N2_variable_av_1d_YYYYMMDD_hzz.asc, where zz is the time stamp as described above. Note that two types of variables exist in the 3-hourly data sets: "in" means instantaneous -- the data are valid exactly AT the given 3-hourly time stamp (i.e.,03, 06,...,24) and then averaged over an entire month; "av" means averaged -- the data were averaged from hourly periods to 3-hourly periods. The compressed files are named as follows: N2_spfh_1d_XXXX_3hourly.tar.gz (XXXX=1986-1995): When extrapolated, there are 2,920 files for each year, 1986-1994, and 2,432 files for 1995 (28,712 total files). N2_dlw_1d_XXXX_3hourly.tar.gz (XXXX=1987-1995): When extrapolated,there are each year, 1987-1990 and 1992-1994, 1,944 files for 1991 and for 1995 (24,328 total files). N2_prec_1d_XXXX_3hourly.tar.gz (XXXX=1986-1995): When extrapolated,there are 2,448 files for 1986, 1,936 files for 1987, and 2,920 files for each year, from 1988-1995 (27,744 total individual files). N2_dsw_1d_XXXX_3hourly.tar.gz (XXXX=1986-1995): When extrapolated,there are 2,920 files for each year, 1986-1994, and 1,944 files for 1995 (28,224 total individual files). For the 7 compressed files below, when extrapolated, there are 2,920 files for each year, 1986-1995(480 total individual files). N2_snlw_1d_XXXX_3hourly.tar.gz: XXXX=1986-1995 N2_snr_1d_XXXX_3hourly.tar.gz: XXXX=1986-1995 N2_snsw_1d_XXXX_3hourly.tar.gz: XXXX=1986-1995 N2_tmp_1d_XXXX_3hourly.tar.gz: XXXX=1986-1995 N2_w10_1d_XXXX_3hourly.tar.gz: XXXX=1986-1995 N2_snd_1d_XXXX_3hourly.tar.gz: XXXX=1986-1995 N2_crp_1d_XXXX_3hourly.tar.gz: XXXX=1986-1995 3-hourly Diurnal Files ----------------------- There are 20 compressed data files (1 file for 20 different variables). When extrapolated,the 20 compressed files contain a total of 18,568 individual.asc data files for the years 1986-1995,with the exception of the file N2_sh_1d... which does not have data for the years 1994 and 1995, and the file N2_snlw_1d.. does not have data for the years 1992 and 1993. The individual files are named N2_variable_av_1d_YYYYMMDD_hHH.asc, where DD denotes a monthly value and HH is the time stamp as described above. Note that two types of variables exist in the monthly-3-hourly data sets: "in" means instantaneous -- the data are valid exactly AT the given 3-hourly time stamp (i.e.,03, 06,...,24) and then averaged over an entire month; "av" means averaged -- the data were averaged from hourly periods to 3-hourly periods, and then over a month. The compressed files are named as follows: N2_lh_1d_diurnal.tar.gz: When extrapolated, there are 63 files for 1986, 64 files for 1987, and 96 files each for the years 1988-1985 (895 total individual files in the compressed file). N2_sh_1d_diurnal.tar.gz: When extrapolated, there are 96 files for each of the years 1986-1991, 46 files for 1992 and 1993, and there are 0 files for 1994-1995 (668 total individual files in the compressed file). N2_snlw_1d_diurnal.tar.gz: When extrapolated, there are 96 files for each year, 1986-1989, 54 files for 1990, 55 files for 1991, 0 files for 1992, 0 files for 1993, and 96 files each for 1994 and 1995 (685 total individual files in the compressed file). For the 17 compressed files below, when extrapolated, there are 96 files for each year, 1986-1995(960 total individual files in each compressed file). N2_dlw_1d_diurnal.tar.gz N2_dsw_1d_diurnal.tar.gz N2_prec_1d_diurnal.tar.gz N2_pres_1d_diurnal.tar.gz N2_roff_1d_diurnal.tar.gz N2_snr_1d_diurnal.tar.gz N2_snsw_1d_diurnal.tar.gz N2_spfh_1d_diurnal.tar.gz N2_tmax_1d_diurnal.tar.gz N2_tmin_1d_diurnal.tar.gz N2_tmp_1d_diurnal.tar.gz N2_tnlw_1d_diurnal.tar.gz N2_tnsw_1d_diurnal.tar.gz N2_u10_1d_diurnal.tar.gz N2_ustr_1d_diurnal.tar.gz N2_v10_1d_diurnal.tar.gz N2_vstr_1d_diurnal.tar.gz