HadISDH data download - version 4.2.0.2019f

The current version of HadISDH is 4.2.0.2019f. For previous versions please contact the dataset maintainers.

These data are available under a free and unrestricted Open Government Licence UK.

NetCDF gridded files contain fields on 5° by 5° resolution from -177.5° W/87.5° N to 177.5° E/-87.5° S.

NetCDF station files contain monthly time series from January 1973 to December 2019.

Missing data are represented by -1e30.

Variables are described below.

The ASCII good station list file contains a WMO identifier (digits 0-5 (a6)), a WBAN identifier (digits 6-10 (a5)), a latitude (digits 11-19 (f9.4)), a longitude (digits 20-29 (f10.4)), an elevation in metres (digits 29-35 (f7.1)), space, a country ID (digits 37-39 (a2)), space, and a name (digits 41-72 (a32)).

The ASCII list of stations with subzero and supersaturated issues contain a WMO identifier (digits 0-5 (a6)), a WBAN identifier (digits 6-10 (a5)), the total number of affected months (digits 28-30 (i3)) and the total number of non-missing months (digits 32-34 (i3)).

The ASCII version of the gridded data lists each month in turn with 72 columns of longitude (-177.5 to 177.5 grid cell centres) and 36 rows of latitude (-87.5 to 87.5 grid cell centres). The longitudes and latitudes are listed at file end.

Product	Description	Data file	Number of Stations Included	Period of record	Size (MB)

HadISDH.land*.4.2.0.2019f grids NetCDF	Land surface grids and uncertainty	HadISDH.landq.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_JAN2020_cf.nc, HadISDH.landRH.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_JAN2020_cf.nc, HadISDH.lande.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_JAN2020_cf.nc, HadISDH.landTd.4.2.0.2019f_FLATgridPHADPD5by5_anoms8110_JAN2020_cf.nc, HadISDH.landTw.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_JAN2020_cf.nc, HadISDH.landT.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_JAN2020_cf.nc, HadISDH.landDPD.4.2.0.2019f_FLATgridPHA5by5_anoms8110_JAN2020_cf.nc,	4332, 4333, 4332, 3693, 3430, 4282, 3868	Jan 1973 to Dec 2019	56M, 56M, 56M, 56M, 56M, 56M, 56M
HadISDH.land*.4.2.0.2019f grids ASCII	Land surface anomalies relative to 1981-2010	HadISDH.landq.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_anomalies_JAN2020.dat, HadISDH.landRH.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_anomalies_JAN2020.dat, HadISDH.lande.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_anomalies_JAN2020.dat, HadISDH.landTd.4.2.0.2019f_FLATgridPHADPD5by5_anoms8110_anomalies_JAN2020.dat, HadISDH.landTw.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_anomalies_JAN2020.dat, HadISDH.landT.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_anomalies_JAN2020.dat, HadISDH.landDPD.4.2.0.2019f_FLATgridPHA5by5_anoms8110_anomalies_JAN2020.dat,	4332, 4333, 4332, 3693, 3430, 4282, 3868	Jan 1973 to Dec 2019	13M, 13M, 13M, 13M, 13M, 13M, 13M
HadISDH.land*.4.2.0.2019f grids ASCII	Land surface actual values	HadISDH.landq.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_actuals_JAN2020.dat, HadISDH.landRH.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_actuals_JAN2020.dat, HadISDH.lande.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_actuals_JAN2020.dat, HadISDH.landTd.4.2.0.2019f_FLATgridPHADPD5by5_anoms8110_actuals_JAN2020.dat, HadISDH.landTw.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_actuals_JAN2020.dat, HadISDH.landT.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_actuals_JAN2020.dat, HadISDH.landDPD.4.2.0.2019f_FLATgridPHA5by5_anoms8110_actuals_JAN2020.dat,	4332, 4333, 4332, 3693, 3430, 4282, 3868	Jan 1973 to Dec 2019	13M, 13M, 13M, 13M, 13M, 13M, 13M
HadISDH.land*.4.2.0.2019f grids ASCII	Land surface uncertainty (2 sigma) including station (measurement, inhomogeneity and climatology) and grid-box sampling	HadISDH.landq.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_uncertainty_JAN2020.dat, HadISDH.landRH.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_uncertainty_JAN2020.dat, HadISDH.lande.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_uncertainty_JAN2020.dat, HadISDH.landTd.4.2.0.2019f_FLATgridPHADPD5by5_anoms8110_uncertainty_JAN2020.dat, HadISDH.landTw.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_uncertainty_JAN2020.dat, HadISDH.landT.4.2.0.2019f_FLATgridIDPHA5by5_anoms8110_uncertainty_JAN2020.dat, HadISDH.landDPD.4.2.0.2019f_FLATgridPHA5by5_anoms8110_uncertainty_JAN2020.dat,	4332, 4333, 4332, 3693, 3430, 4282, 3868	Jan 1973 to Dec 2019	13M, 13M, 13M, 13M, 13M, 13M, 13M
HadISDH.land*.4.2.0.2019f stations NetCDF	Land surface stations and uncertainty tarball (tar -xzf to unpack)	HadISDH.landq.4.2.0.2019f.stations, HadISDH.landRH.4.2.0.2019f.stations, HadISDH.lande.4.2.0.2019f.stations, HadISDH.landTd.4.2.0.2019f.stations, HadISDH.landTw.4.2.0.2019f.stations, HadISDH.landT.4.2.0.2019f.stations, HadISDH.landDPD.4.2.0.2019f.stations	4401, 4398, 4401, 3921, 4403, 4282, 4092	Jan 1973 to Dec 2019	30M, 18M, 30M, 24M, 17M, 16M, 25M
HadISDH.land*.4.2.0.2019f good station list ASCII	Stations by WMO identifier, latitude, longitude and elevation	PosthomogIDPHAq_anoms8110_goodsHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogIDPHArh_anoms8110_goodsHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogIDPHAe_anoms8110_goodsHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogPHADPDtd_anoms8110_goodsHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogIDPHAtw_anoms8110_goodsHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogIDPHAt_anoms8110_goodsHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogPHAdpd_anoms8110_goodsHadISDH.4.2.0.2019f_JAN2020.txt	4401, 4398, 4401, 3921, 4403, 4282, 4092	Jan 1973 to Dec 2019	340K, 340K, 340K, 303K, 340K, 331K, 316K
HadISDH.land*.4.2.0.2019f sub-zero values station list ASCII	Stations by WMO identifier, latitude, longitude and elevation	PosthomogIDPHAq_anoms8110_subzerosHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogIDPHAe_anoms8110_subzerosHadISDH.4.2.0.2019f_JAN2020.txt	44, 44	Jan 1973 to Dec 2019	1.6K, 1.6K
HadISDH.land*.4.2.0.2019f supersaturated values station list ASCII	Stations by WMO identifier, latitude, longitude and elevation	PosthomogIDPHAq_anoms8110_satsHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogIDPHArh_anoms8110_satsHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogIDPHAe_anoms8110_satsHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogPHADPDtd_anoms8110_satsHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogIDPHAtw_anoms8110_satsHadISDH.4.2.0.2019f_JAN2020.txt, PosthomogPHAdpd_anoms8110_satsHadISDH.4.2.0.2019f_JAN2020.txt	65, 65, 65, 220, 973, 224	Jan 1973 to Dec 2019	2.6K, 2.6K, 2.6K, 7.8K, 34K, 7.9K

NetCDF gridded file field	Description	Dimensions	Max and Min values

q_abs, rh_abs, e_abs, td_abs, tw_abs, t_abs, dpd_abs	Monthly mean values	72 by 36 by 564	0.00 to 23.53 g kg^-1, 6.24 to 99.61 %rh, 0.00 to 37.29 hPa, -53.25 to 27.64 °C, -45.43 to 29.20 °C, -53.73 to 40.48 °C, 0.00 to 44.45 °C
q_anoms, rh_anoms, e_anoms, td_anoms, tw_anoms, t_anoms, dpd_anoms	Monthly mean climate anomaly from the 1981-2010 climatology period (only climatological mean subtracted, not standardised)	72 by 36 by 564	-6.66 to 6.31 g kg^-1, -53.30 to 41.07 %rh, -10.09 to 9.59 hPa, -21.14 to 17.37 °C, -20.80 to 18.48 °C, -22.11 to 17.30 °C, -14.98 to 14.20 °C
q_std, rh_std, e_std, td_std, tw_std, t_std, dpd_std	Standard deviation of all station monthly mean anomalies within the gridbox for each month	72 by 36 by 564	0.00 to 11.70 (100) g kg^-1, 0.00 to 44.93 (100) %rh, 0.00 to 19.39 (100) hPa, 0.00 to 24.35 (100) °C, 0.00 to 21.57 (100) °C, 0.00 to 22.90 (100) °C, 0.00 to 22.35 (100) °C
q_combinederr, rh_combinederr, e_combinederr, td_combinederr, tw_combinederr, t_combinederr, dpd_combinederr	Station uncertainty and sampling uncertainty combined in quadrature to give a 2σ uncertainty	72 by 36 by 564	0.01 to 0.90 g kg^-1, 0.07 to 20.39 %rh, 0.01 to 1.57 hPa, 0.02 to 2.07 °C, 0.02 to 1.72 °C, 0.02 to 1.93 °C, 0.01 to 2.28 °C
q_samplingerr, rh_samplingerr, e_samplingerr, td_samplingerr, tw_samplingerr, t_samplingerr, dpd_samplingerr	2σ Spatio-temporal sampling uncertainty within the gridbox	72 by 36 by 564	0.00 to 0.80 g kg^-1, 0.03 to 39.98 %rh, 0.00 to 1.89 hPa, 0.01 to 3.57 °C, 0.00 to 3.07 °C, 0.01 to 3.42 °C, 0.00 to 3.92 °C
q_rbar, rh_rbar, e_rbar, td_rbar, tw_rbar, t_rbar, dpd_rbar	Average inter-site correlation	72 by 36	0.69 to 0.90^-1, 0.69 to 0.89, 0.69 to 0.90, 0.69 to 0.90, 0.69 to 0.90, 0.69 to 0.92, 0.59 to 0.89
q_sbarSQ, rh_sbarSQ, e_sbarSQ, td_sbarSQ, tw_sbarSQ, t_sbarSQ, dpd_sbarSQ	Estimate of the mean variance of individual stations in the gridbox	72 by 36	0.03 to 10.00 g kg^-1, 1.65 to 104.34 %rh, 0.08 to 10.00 hPa, 0.09 to 15.31 °C, 0.08 to 12.52 °C, 0.07 to 14.63 °C, 0.08 to 13.92 °C
q_stationerr, rh_stationerr, e_stationerr, td_stationerr, tw_stationerr, t_stationerr, dpd_stationerr	Climatological, measurement and adjustment uncertainty combined in quadrature to give a 2σ station uncertainty	72 by 36 by 564	0.01 to 1.74 g kg^-1, 0.12 to 11.30 %rh, 0.02 to 2.66 hPa, 0.03 to 2.80 °C, 0.02 to 1.93 °C, 0.02 to 2.07 °C, 0.02 to 2.32 °C
q_adjerr, rh_adjerr, e_adjerr, td_adjerr, tw_adjerr, t_adjerr, dpd_adjerr	2σ adjustment uncertainty for inhomogeneity in the data	72 by 36 by 564	0.02 to 1.74 g kg^-1, 0.23 to 20.00 %rh, 0.03 to 5.28 hPa, 0.04 to 5.36 °C, 0.05 to 2.80 °C, 0.04 to 3.36 °C, 0.03 to 4.24 °C
q_obserr, rh_obserr, e_obserr, td_obserr, tw_obserr, t_obserr, dpd_obserr	2σ measurement uncertainty	72 by 36 by 564	0.00 to 0.32 g kg^-1, 0.02 to 3.87 %rh, 0.00 to 0.50 hPa, 0.00 to 1.56 °C, 0.00 to 0.04 °C, 0.00 to 0.05 °C, 0.01 to 1.61 °C
q_climerr, rh_climerr, e_climerr, td_climerr, tw_climerr, t_climerr, dpd_climerr	2σ climatological uncertainty	72 by 36 by 564	0.00 to 1.20 g kg^-1, 0.06 to 6.07 %rh, 0.01 to 1.79 hPa, 0.01 to 2.94 °C, 0.01 to 3.16 °C, 0.02 to 2.85 °C, 0.01 to 2.10 °C
q_clims, rh_clims, e_clims, td_clims, tw_clims, t_clims, dpd_clims	Monthly climatologies over the 1981-2010 period	72 by 36 by 12	0.05 to 21.92 g kg^-1, 12.04 to 94.48 %rh, 0.10 to 34.18 hPa, -46.12 to 25.90 °C, -35.85 to 27.01 °C, -46.19 to 38.06 °C, 0.48 to 38.01 °C
mean_n_stations	Total number of stations within the gridbox over entire record	72 by 36	0 to 78, 0 to 78, 0 to 78, 0 to 63, 0 to 64, 0 to 78, 0 to 65
actual_n_stations	Actual number of stations within the gridbox for each time step	72 by 36 by 564	0 to 78, 0 to 78, 0 to 78, 0 to 60, 0 to 64, 0 to 77, 0 to 62
latitude	Latitude in 5°	72 by 36	-87.5° S to 87.5° N
longitude	Longitude in 5°	72 by 36	-177.5° W to 177.5° E
time	Gregorian: Days since 1st January 1973 00:00:00	564	15 = January 1973, 17150 = December 2019
months	1-12	12	1 to 12

NetCDF station file field	Description	Dimensions

*_abs	Monthly mean value	564
*_anoms	Monthly mean anomaly from the 1981-2010 climatology period (climate anomaly, not standardised)	564
*_stds	Standard deviation of all station monthly mean anomalies within the gridbox for each month	564
*_uncertainty	Climatological, measurement and adjustment uncertainty combined in quadrature to give a 2σ station uncertainty	564
*_adjerr	2σ adjustment uncertainty	564
*_obserr	2σ measurement uncertainty	564
*_climerr	2σ climatological uncertainty	564
*_clims	Monthly climatologies over the 1981-2010 period	12
times	Months since January 1973	564
months	1-12	12

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