This file summaries HadUK-Grid version changes. 

Associated files within this folder provide additional information. 

Comparisons are made between v1.0.3.0 and v1.0.2.1. 

HadUK-Grid_v1.0.3.0_change_log - Audit and summary of files comparing v1.0.3.0 with v1.0.2.1
HadUK-Grid_v1.0.3.0_grid_file_comparison - Summary statistics of changes to data in each gridded data file
HadUK-Grid_v1.0.3.0_regional_average_comparison - Summary statistics of changes to regional averages (country, region, river)
HadUK-Grid_v1.0.3.0_station_changes - Summary of changes to the underlying station observations used to produce the dataset

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