10 May 2023
 | 10 May 2023
Status: this preprint is currently under review for the journal CP.

Drought reconstruction since 1796 CE based on tree-ring widths in the Upper Heilongjiang (Amur) River Basin in Northeast Asia, and its linkage to Pacific Ocean climate variability

Yang Xu, Heli Zhang, Feng Chen, Shijie Wang, Mao Hu, Martín Hadad, and Fidel Roig

Abstract. The economic and environmental impacts of persistent droughts in East Asia are of growing concern, and therefore it is important to study the cyclicity and causes of these regional droughts. The self-calibrating Palmer Drought Severity Index (scPDSI) has been extensively employed to describe the severity of regional drought, and several PDSI reconstructions based on tree rings have been produced. We compiled a tree-ring chronology for Hailar pine (Pinus sylvestris var. Mongolica) from two sites in the Hailar region in the Upper Heilongjiang (Amur) River Basin. Analysis of the climate response revealed that scPDSI was the primary factor limiting tree ring growth from May to July. The mean May to July scPDSI in the Hailar region since 1796 was reconstructed from the tree-ring width chronology. The results of spatial correlation analysis revealed that the reconstructed scPDSI in this region responded significantly to climate change. Analysis of the synoptic climatology indicated that the drought in the Upper Heilongjiang (Amur) River Basin is closely related to ENSO and the Silk Road teleconnection. The results of atmospheric water cycle analysis show that water vapor transport processes are the dominant factor in the development of drought in this region.

Yang Xu et al.

Status: open (until 19 Jul 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Yang Xu et al.


Total article views: 204 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
164 35 5 204 11 2 2
  • HTML: 164
  • PDF: 35
  • XML: 5
  • Total: 204
  • Supplement: 11
  • BibTeX: 2
  • EndNote: 2
Views and downloads (calculated since 10 May 2023)
Cumulative views and downloads (calculated since 10 May 2023)

Viewed (geographical distribution)

Total article views: 200 (including HTML, PDF, and XML) Thereof 200 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
Latest update: 03 Jun 2023
Short summary
We reconstructed the monthly mean scPDSI for May–July in the Upper Heilongjiang (Amur) Basin since 1796. Our analysis suggests that the dry/wet variability in the Upper Heilongjiang (Amur) River Basin is related to several large-scale climate stresses and atmospheric circulation patterns (the ENSO and Silk Road models). the cause of drought is primarily a reduction in advective water vapor transport, rather than precipitation circulation processes.