Abstract
The recent â € 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 â '0.007 ± 0.065 PgC yr â '2 over the warming period (1982 to 1998) to 0.119 ± 0.071 PgC yr â '2 over the warming 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 (3 = 4.05 to 9.40 PgC yr â '1 per °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.
| Original language | English |
|---|---|
| Pages (from-to) | 148-152 |
| Number of pages | 5 |
| Journal | Nature Climate Change |
| Volume | 7 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 1 2017 |
Funding
This work was stimulated by a workshop on abrupt changes in the global carbon cycle sponsored by Princeton University and the The Finnish Society of Sciences and Letters. Further support for this research was provided by NSF-DEB no. 1550932 and USDA no. MONZ-1302.W.R.L.A. was supported by a NOAA global change fellowship andW.K.S. was supported by a Luc Homan Fellowship. Satellite observations and MOD-17 algorithm development were supported by NASA grant NNX08AG87A to S.W.R.We are also grateful to the global citizens and NOAA scientists who have helped maintain the global atmospheric CO2 observation network. This work was greatly improved through input from colleagues D. Lombardozzi and B. Sullivan.
| Funders | Funder number |
|---|---|
| 1550932 | |
| 1633831 | |
| National Aeronautics and Space Administration | NNX08AG87A |
| National Oceanic and Atmospheric Administration | |
| MONZ-1302 | |
| Princeton University | |
