Global net community production estimated from the annual cycle of surface water total dissolved inorganic carbon

Global net community production is determined, for the first time, from the decrease in salinity (S)-normalized total dissolved inorganic carbon (NCT = C-T x 35/S) inventory in the surface mixed layer corrected for changes due to net air-sea CO2 exchange and diffusive carbon flux from the upper ther...

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Bibliographic Details
Published in:Limnology and Oceanography
Main Author: Lee, K
Other Authors: 환경연구소, 10056383
Format: Article in Journal/Newspaper
Language:English
Published: AMER SOC LIMNOLOGY OCEANOGRAPHY 2001
Subjects:
SUB-ARCTIC PACIFIC
SARGASSO SEA
ORGANIC-CARBON
DEEP-OCEAN
FLUX
SEAWATER
NITRATE
CO2
DISSOCIATION
TEMPERATURE
Arctic
Pacific
Online Access:https://oasis.postech.ac.kr/handle/2014.oak/11349
https://doi.org/10.4319/lo.2001.46.6.1287
Description
Summary:Global net community production is determined, for the first time, from the decrease in salinity (S)-normalized total dissolved inorganic carbon (NCT = C-T x 35/S) inventory in the surface mixed layer corrected for changes due to net air-sea CO2 exchange and diffusive carbon flux from the upper thermocline. Changes in the mixed layer NCT inventory are estimated using a derived annual cycle of NCT and global records of the mixed layer depth. The annual NCT cycle is deduced from regional algorithms relating NCT to sea surface temperature (SST) and nitrate (NO3-), along with global records of seasonal mean SST and NO3-, and from the monthly mean surface partial pressure of CO2 and total alkalinity fields using thermodynamic models. The two methods show similar regional trends and yield global net community production estimates of 6.7 and 8.0 Gt C (1 Gt C = 1 x 10(12) kg carbon), respectively. The two global estimates are not significantly different and represent an 8-month period of 1990 (warming period) during which the mixed layer NCT concentration decreases. However, the estimates do not account for net community production during a 4-month cooling period. Ratios of net community production during the warming and cooling periods are estimated from multiyear sediment trap data at the Hawaii Ocean Time-series (22 degreesN, 158 degreesW) and Ocean Weather Station P (50 degreesN, 145 degreesW) sites. Global extrapolation of these ratios yields annual rates of net community production of 9.1 +/- 2.7 and 10.8 +/- 2.7 Gt C yr(-1). open 1 1 111 scie scopus

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