This file summarises HadUK-Grid version changes. Associated files within this folder provide additional information. Comparisons are made between v1.1.0.0 and v1.0.3.0. HadUK-Grid_v1.1.0.0_change_log - Audit and summary of files comparing v1.1.0.0 with v1.0.3.0 HadUK-Grid_v1.1.0.0_grid_file_comparison - Summary statistics of changes to data in each gridded data file HadUK-Grid_v1.1.0.0_regional_average_comparison - Summary statistics of changes to regional averages (country, region, river) HadUK-Grid_v1.1.0.0_station_changes - Summary of changes to the underlying station observations used to produce the dataset V1.1.0.0 -------- *Added data for calendar year 2021 *Added data for 30 year average period 1991-2020 *Updated 30 year averages for 1961-1990 and 1981-2010. This is an order of operation change. In this version the 30 year averages are calculated from the underlying monthly/seasonal/annual grids (grid-then-average) in previous versions they were grids of interpolated station averages (average-then-grid). This order of operation change results in small differences to the values, but provides improved consistency with the monthly/seasonal/annual series grids. *Order of operation change to 30 year averages means that 1961-1990 averages are not included for sfcWind or snowLying variables due to the start date for these variables being 1969 and 1971 respectively. *Added Rainfall Rescue monthly rainfall data. This source now accounts for 84% of pre-1960 monthly rainfall data. Extended monthly rainfall series back to 1836. *Net changes to the input station data: -Total of 122664065 observations -118464870 (96.5%) unchanged -4821 (0.004%) modified for this version -4194374 (3.4%) added in this version -5887 (0.005%) deleted from this version *Changes to monthly rainfall 1836-1960: -Total of 3347841 observations -544198 (16%) unchanged -1823 (0.05%) modified for this version -2801820 (84%) added in this version -4534 (0.1%) deleted from this version *Reference Hawkins et al. (2022): Millions of historical monthly rainfall observations taken in the UK and Ireland rescued by citizen scientists. Geoscience Data Journal. Article DOI: 10.1002/gdj3.157 V1.0.3.0 -------- * Added data for calendar year 2020 * Corrected _FillValue designation in Seasonal and Annual gridded data * Some additional QC amendments applied to historical MIDAS data * Net changes to the input station data: -Total of 118475657 observations -117298602 (99%) unchanged -8162 (0.007%) modified for this version -1168893 (0.99%) added in this version -3566 (0.003%) deleted from this version V1.0.2.1 -------- * Corrected grid definition for 12km grid product to match UKCP18 climate model products * Changed the netcdf _FillValue, now set at 1.0e20 * Updated filter to remove late arriving daily rainfall observations that have not passed through full quality control * Corrections to early monthly sunshine observations * Net changes to the input data for v.1.0.2.1 compared to v1.0.2.0: * Daily rainfall data 2018-2019: -Total of 1776543 observations -109 corrections -285 additions -6274 removals * Monthly sunshine data 1919-1928: -Total of 22041 observations -16 corrections -17 removals V1.0.2.0 (not published, changes have been included in v1.0.2.1) ----------------------------------------------------- * Added data for calendar year 2019 * Added newly digitised data collections: - Monthly Sunshine 1919-1928, extending the related monthly sunshine series accordingly - Operation Weather Rescue. Daily rainfall, monthly temperature and monthly rainfall for 1900-1910 - Operation Weather Rescue. Ben Nevis, daily rainfall, monthly temperature and rainfall 1883-1904 - Rainfall Rescue, early release monthly rainfall 1862-1909 UK stations as available in May 2020 from https://github.com/ed-hawkins/rainfall-rescue * Additional QC corrections and removals applied to historical MIDAS observations * Net changes to the input station data: -Total of 117661423 observations -116106524 (98.6%) unchanged -118294 (0.1%) modified for this version -1436605 (1.2%) added in this version -141719 (0.1%) deleted from this version * Reference: Hawkins, E.; Craig, P. (2019): Meteorological observations recovered by the Weather Rescue project. Centre for Environmental Data Analysis, date of citation. http://catalogue.ceda.ac.uk/uuid/56c03beb2e11472d87d547ea53c95f51 V1.0.1.0 -------- * Added data for calendar year 2018 * Added a 5km resolution grid V1.0.0.0 -------- * First release * DOI:10.1002/gdj3.78