Monsoon circulation over the Amur River basin during catastrophic flood and extreme drought in summer

Abstract

Ab stract-Two op po site Far East mon soon sum mer sea sons over the Amur River ba sin are in ves tigated which caused the ex treme drought and fires in 2008 and cat a strophic flood in 2013. It is shown that in the low-water sum mer of 2008 due to block ing pro cesses, po lar-front cy clones were al most absent over the Amur, were short, had fuzzy fron tal systems, and did not bring pre cip i ta tion. The sum mer mon soon cir cu la tion was sup pressed, and in the Amur re gion con ti nen tal air masses dom i nated over marine trop i cal air. On the con trary, the sum mer of 2013 was char ac ter ized by un prec e dented cy clonic ac tiv ity and the sharp strength en ing of the mois ture-laden mon soon flow from the ocean. As a re sult, the in ten si fi ca tion of sum mer mon soon pre cip i ta tion and the Amur flood were ob served. It was es tab lished that the Far East summer monsoon anomalies are as so ci ated with the large-scale trans for ma tion of atmo spheric cir cu la tion over the Asia-Pa cific re gion.

Similarities and Differences in the Earth’s Water Variations Signal Provided by Grace and AMSR-E Observations Using Maximum Covariance Analysis at Various Land Cover Data Backgrounds

“…This is also confirmed in Figure 12 m), n) presenting the time series for this area. Extreme droughts and wildfires in 2008 described previously in Semenov et al (2017) are reflected in GRACE observations in this research, represented by an anomaly in this period, which is entirely absent in microwave observations.…”

Wetland vegetation cover changes and its response to climate changes across Heilongjiang-Amur River Basin

“…Because of the higher latitude and low human activities, the wetland vegetation change in Russia mostly relies on climate change, as East Asian monsoons pronounced summer floods are typical for the Far Eastern regime (Poiani and Johnson, 1993;Egidarev et al, 2016a). After the largest flood of the last century took place in 2013, the Russian government instructed the related department to hold consultations with China, including building hydraulic facilities on the Amur and its tributaries (Semenov et al, 2017). Thus, wetlands especially floodplain wetlands protection and management became scientific.…”

Impact of Deforestation on Streamflow in the Amur River Basin

“…with monsoon circulation, as well as a transitional zone between the temperate climate and tropics, which has the main influence on the hydrological regime of the Amur River with characteristic flooding. Over the past 20 years, the Amur River regime in the Far-eastern monsoon system is characterised by low levels of water in the summer, when the trajectories of shallow and short cyclones occur along the periphery of the Amur basin (1996, 2008) [33] (p.143). The geography of the basin has the shape of alternating mountain ridges and chains, oriented in the north-western direction, and intermountain hollows.…”