Accelerating net terrestrial carbon uptake during the warming hiatus due to reduced respiration

作者：Ballantyne Ashley^*; Smith William; Anderegg William; Kauppi Pekka; Sarmiento Jorge; Tans Pieter; Shevliakova Elena; Pan Yude; Poulter Benjamin; Anav Alessandro; Friedlingstein Pierre; Houghton Richard; Running Steven

来源：Nature Climate Change, 2017, 7(2): 148-+.

DOI：10.1038/NCLIMATE3204

The recent ` warming hiatus' presents an excellent opportunity to investigate climate sensitivity of carbon cycle processes. Here we combine satellite and atmospheric observations to show that the rate of net biome productivity (NBP) has significantly accelerated from 0.007 +/- 0.065 PgC yr(-2) over thewarming period (1982 to 1998) to 0.119 +/- 0.071 PgC yr(-2) over thewarming hiatus (1998-2012). This acceleration in NBP is not due to increased primary productivity, but rather reduced respiration that is correlated (r = 0.58; P = 0.0007) and sensitive (gamma = 4.05 to 9.40 PgC yr(-1) per degrees C) to land temperatures. Global land models do not fully capture this apparent reduced respiration over the warming hiatus; however, an empirical model including soil temperature and moisture observations better captures the reduced respiration.

• 出版日期2017-2