Figure 5
3.4 The main attribution of TWS changes in the
EIB
Figure 6 shows the spatial distribution of the TWSA trends in the EIB
for 2002–2020; generally, this distribution was similar among the five
products, in which significant decreasing trends were observed in most
regions. The highest decreasing magnitude was observed in the Caspian
Sea region. The TWSA showed that there were significant increasing
trends in several regions, including headwater regions (mainly located
in the Qinghai-Tibetan Plateau) of the QB, QPB, and TaRB in the
southeastern EIB and a small part of the north-central EIB (headwaters
of the northwest BLB). In addition, the TWSA also showed non-significant
increasing trends in some headwater regions of the Volga River. Although
the spatial distribution of trends was consistent among the five
products, there were clear differences in the magnitude of the trends
for the Caspian Sea region, especially at the core part of the Caspian
Sea. The decreasing magnitude of two mascon products exceeded -70 cm/10a
at the core part of the Caspian Sea, which is more than twice that of
the v3 products.