This README.txt file was generated on 18 December 2020 by Boyi Liu (Department of Geography, HKU) ------------------- GENERAL INFORMATION ------------------- 1. SD1 is the Supplementary Dataset for the manuscript entitled 'Spatial and temporal variability of pCO2 and CO2 emissions from the Dongjiang River in South China'. 2. Contact information Lishan Ran Department of Geography, HKU Email:lsran@hku.hk --------------------- DATA DESCRIPTION --------------------- Part 1: Data_pCO2 and FCO2 This sheet includes the longitude and latitude of sample sites and the steam order of sampled rivers. Forty three (43) measurements were performed in each campaign. Column A: Sample sites number from 1 to 43 Column B: longitude of Sample sites Column C: latitude of Sample sites Column D: stream order of sampled rivers Part 2: Data_pCO2 This sheet includes the pCO2 results from the five sampling campaigns in the Dongjiang River Basin from December 2018 to October 2019. Forty three (43) measurements were performed in each campaign. Column A: Sample sites number from 1 to 43 Column B: Date and time of 1st sampling campaign from December 2018 to January 2019 Column C: pCO2 in December 2018 and January 2019 Column D: Date and time of 2nd sampling campaign in April 2019 Column E: pCO2 in April 2019 Column F: Date and time of 3rd sampling campaign in July 2019 Column G: pCO2 in July 2019 Column H: Date and time of 4th sampling campaign in August 2019 Column I: pCO2 in August 2019 Column J: Date and time of 5th sampling campaign in October 2019 Column K: pCO2 in October 2019 Part 3: Data_k600 and FCO2 This sheet includes the k600 and FCO2 results from the five sampling campaigns in the Dongjiang River Basin from December 2018 to October 2019. In total, 196 chamber measurements were made. In 19 out of 215 sample sites, the drifting chamber was unable to deploy due to shallow water or high flow velocity. 8 out of 196 k600 data with the air–water pCO2 gradient less than 200 μatm were also excluded, as the error in these calculations could be considerable. Column A: Sample sites number from 1 to 43 Column B: Date and time of 1st sampling campaign from December 2018 to January 2019 Column C: k600 in December 2018 and January 2019 Column D: FCO2 in December 2018 and January 2019 Column E: Date and time of 2nd sampling campaign in April 2019 Column F: k600 in April 2019 Column G: FCO2 in April 2019 Column H: Date and time of 3rd sampling campaign in July 2019 Column I: k600 and in July 2019 Column J: FCO2 in July 2019 Column K: Date and time of 4th sampling campaign in August 2019 Column L: k600 in August 2019 Column M: FCO2 in August 2019 Column N: Date and time of 5th sampling campaign in October 2019 Column O: k600 in October 2019 Column P: FCO2 in October 2019