Imply worth of Summer time (as much as 1.25 kPa) significantlyRemote Sens. 2021, 13,6 ofhigher

Imply worth of Summer time (as much as 1.25 kPa) significantlyRemote Sens. 2021, 13,6 ofhigher than
Mean worth of summer (S)-(-)-Phenylethanol MedChemExpress season (up to 1.25 kPa) significantlyRemote Sens. 2021, 13,6 ofhigher than other seasons (Table 1). This could be explained by significantly less SB-612111 Inhibitor rainfall from autumn in 2019 to summer time in 2020, top to drought anxiety more than this period (Figure 2c). More than this period, the cumulative rainfall only reached 778.9 mm, roughly equivalent to the rainfall of summer time (774.eight mm) in 2018 and also significantly less than that of summer season (814.1 mm) in 2017 (Table 1). We also compared the quantity of rainfall more than this period with the multi-year (2011019) rainfall measurements from a meteorological station in the China Meteorological Administration ( ten km away in the study region). The rainfall over this period only accounted for approximately half from the multi-year mean annual rainfall. The every day maximum water level tended to be larger in autumn and showed no obvious Remote Sens. 2021, 13, x FOR PEER Overview 7 of 17 distinction amongst years (Figure 2b). The salinity was higher in winter among seasons and also the average salinity was reasonably larger in 2020 than in preceding years (Figure 2c).Figure 2. Seasonal and annual variations in daytime mean values of environmental variables ((a): Figure 2. Seasonal and annual variations in daytime imply values of environmental variables photosynthetically active radiation and and air temperature, (b): pressure deficit deficit and maxi((a): photosynthetically active radiation air temperature, (b): vapor vapor pressure and maximum surface water level, (c): (c): rainfall surface water salinity) from January 2017 to to December 2020. mum surface water level, rainfall andand surface water salinity) from January 2017December 2020. Lines and bars indicatemonthly mean values. PAR = photosynthetically active radiation; Tair = air air Lines and bars indicate month-to-month mean values. PAR = photosynthetically active radiation; Tair = temperature; VPD = vapor pressure deficit. temperature; VPD = vapor pressure deficit.Table 1. Seasonal imply values of environmental, spectral, and carbon-related variables from January 2017 to December The seasonal LUE varied from 0.013 to 0.028 mol mol-1 and tended to show a U2020, with higher VPD and decrease rainfall values indicating the 2019020 drought pressure highlighted in bold.Variables Spring Summer Autumn Winter Spring Summer season Autumn Winter Spring Summer Autumn Winter Spring Summer season Autumnshaped pattern with higher LUE in spring and winter and reduced LUE in summer and PAR GPP NEE Surface LUE autumn (Figure 3a). Compared with annual mean values in previous years, the imply Tair VPD Rainfall Salinity (mmol ( ol ( ol Water PRI (mol values in 2020 decreased by 12 . GPP and NEE shared comparable seasonal patterns, displaying (mm) (PSU) ( ) (kPa) m-2 s-1) Level (m) mol-1) m-2 s-1) m-2 values higher values in spring and summer season (Figure 3b). Compared with all the annual imply s-1) -1 ), the 15.88, 16.51 0.77of GPP in preceding years (16.71, 265.2 and 12.43 ol m-2 s0.025 annual mean values 22.50 0.33 0.40 0.16 16.58 13.38 in 2020 decreased by 9.0 . Similarly, the imply values of NEE in 2020 decreased13.26 by ten.7 1.09 30.36 0.56 0.35 814.1 five.40 0.15 0.018 17.97 in comparison with previous years (13.22, 12.53, and0.16 ol m-2 16.22 (Table 1). The 12.98 0.020 s-1 ) 0.90 26.67 0.59 0.52 77.3 15.31 12.80 the 0.74decrease inside the carbon sink appeared to lag behind 0.12 escalating VPD and decreasing 17.60 0.31 0.40 94.9 13.16 0.024 16.05 13.43 3). 1.00rainfall (Figures two and0.24 24.43 0.47 186.five 14.89 0.16 0.018 17.66 13.82 1.02 29.94 0.69 0.40.