| Title: |
Terrestrial hydrology |
| Authors: |
Mård, Johanna; Box, Jason E.; Culpepper, Joshua; Sharma, Sapna; Shiklomanov, Alexander; Sjöberg, Ylva; Vihma, Timo Pekka; Webb, Elisabeth |
| Publisher Information: |
Uppsala universitet, Luft-, vatten- och landskapslära; York University, Canada; University of New Hampshire, USA; Umeå universitet, Institutionen för ekologi, miljö och geovetenskap; Finnish Meteorological Institute, Finland; Duke University, USA; AMAP - Arctic Monitoring and Assessment Programme; The Geological Survey of Denmark and Greenland |
| Publication Year: |
2024 |
| Collection: |
Uppsala University: Publications (DiVA) |
| Subject Terms: |
Climate Science; Klimatvetenskap |
| Description: |
• Precipitation has increased over recent decades, especially incold seasons, and is associated with an increase in rainfallin all seasons and a decrease in snowfall in summer, withspatially varying trends in winter. This century, precipitationevents presently regarded as extremes are expected to becomeroutine. Snow mass has decreased across northern NorthAmerica, but in Eurasia the trend has been negligible andsnow depth has increased in parts of Eurasia. • Permafrost thaw is likely to drive changes in the waterbalance in Arctic areas, but the relevant subsurface processesare difficult to observe directly at the catchment scale.However, observed changes in streamflow dynamics andwater chemistry indicate that permafrost thaw is influencinghydrological connectivity by creating deeper and longerwaterflow pathways through catchments across the Arctic. • Increasing trends in annual river discharge to the Arctic Oceanfrom both continents have continued, providing compellingevidence of intensification of the Arctic water cycle. Asignificant increase in base streamflow during the cold seasonis observed across most regions of the pan-Arctic drainagebasin. The magnitude of maximum river discharge has notchanged significantly; however, the timing of snowmelt freshethas become earlier almost everywhere across the pan-Arctic. • Lake area is declining across the discontinuous permafrostzone. In the continuous permafrost zone, however, the numberof sites with decreasing lake area is similar to the numberwith increasing lake area. Stronger lake area declines in thediscontinuous permafrost zone is consistent with permafrostthaw being further advanced there than in the continuouspermafrost zone. • Ice-cover duration on rivers has declined significantly in coldregions over the past several decades due to later freeze-upand earlier breakup. The observed decline in river ice is likelyto continue in the future due to the projected increase in airtemperature. Maximum river-ice thickness has decreasedsignificantly on most pan-Arctic ... |
| Document Type: |
book part |
| File Description: |
application/pdf |
| Language: |
English |
| ISBN: |
978-82-7971-203-9; 82-7971-203-8 |
| Relation: |
AMAP arctic climate change update 2024 : key trends and impacts, p. 57-94; urn:isbn:9788279712039 |
| DOI: |
10.21352/q1rn-0246 |
| Availability: |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-575562; https://doi.org/10.21352/q1rn-0246 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.2B52D253 |
| Database: |
BASE |