This file summaries HadUK-Grid version changes. 

Associated files within this folder provide additional information. 

Comparisons are made between v1.0.2.1 and v1.0.1.0. This includes the changes made at v1.0.2.0 which has not been published
as a stand alone dataset, but has been referenced in some products.

HadUK-Grid_v1.0.2.1_change_log - Audit and summary of files comparing v1.0.2.1 with v1.0.1.0
HadUK-Grid_v1.0.2.1_grid_file_comparison - Summary statistics of changes to data in each gridded data file
HadUK-Grid_v1.0.2.1_regional_average_comparison - Summary statistics of changes to regional averages (country, region, river)
HadUK-Grid_v1.0.2.1_station_changes - Summary of changes to the underlying station observations used to produce the dataset

V1.0.2.1
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* 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