Van­ish­ing ponds of the Arc­tic

Down to Earth - - ANALYSIS - WARM­ING TEM­PER­A­TURE S

are shrink­ing ponds in the Arc­tic tun­dra. Rise in tem­per­a­ture thaws nu­tri­ent-rich per­mafrost, re­leas­ing nu­tri­ents into ponds and en­hanc­ing plant growth, which takes over shal­low ponds. More than 2,800 ponds in the north­ern re­gion of Alaska's Barrow Penin­sula were an­a­lysed with pho­tos and satel­lite images be­tween 1948 and 2010. The num­ber of ponds had de­creased by 17 per cent, while pond size had shrunk by an av­er­age of one-third. Jour­nal of Geo­phys­i­cal Re­search: Bio­geo­sciences, March 12

Newspapers in English

Newspapers from India

© PressReader. All rights reserved.