Table 2.
Changes in the European carbon balance (GPP, TER, NEE) in TgC during the period July–September 2018 (JAS), integrated over the northwest European drought-affected area (figure 1), for SIF, NIRv, SiB4 and CTE. Numbers represent deviations from the climatological averages (2013–2017). 1σ values for SIF and NIRv result from propagating uncertainty on the fitted slopes (also see electronic supplementary material, table S3). The CTE range is composed of two alternative simulations: one with SiB4 NEE as a prior and the other using the 5-year climatology of SiB4 NEE as a prior. Note that GPP and TER are defined as positive quantities here; thus a negative number represents less gross uptake (GPP) and less gross release (TER), while less net carbon uptake (NEE) is shown by a positive number. The fractional area of the different land-use types is specified relative to the total drought area of 1.6 × 106 km2.
|
2018 JAS anomalies in comparison with 2013–2017 mean |
||||||
|---|---|---|---|---|---|---|
| GPP |
TER | NEE |
||||
| aggregation | SIF (1σ) | NIRv (1σ) | SiB4 | SiB4 | SiB4 | CTE range |
| forest (28%) | −97 (22) | −56 (19) | −20 | −6.0 | 14 | 16–24 |
| grassland (22%) | −86 (14) | −55 (12) | −101 | −73 | 28 | 13–20 |
| crops (27%) | −119 (33) | −69 (18) | −7.9 | 6.3 | 14 | 12–25 |
| other (23%) | −38 (10) | −23 (8) | −1.4 | 0.2 | 1.5 | 11–14 |
| full area | −340 (43) | −203 (30) | −130 | −73 | 57 | 52–83 |