FN Archimer Export Format PT J TI Autocorrelation characteristics of surface ocean pCO2 and air-sea CO2 fluxes BT AF JONES, S. D. LE QUERE, C. ROEDENBECK, C. AS 1:1;2:1,2;3:3; FF 1:;2:;3:; C1 Univ E Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England. British Antarctic Survey, Cambridge CB3 0ET, England. Max Planck Inst Biogeochem, Jena, Germany. C2 UNIV E ANGLIA, UK BRITISH ANTARCTIC SURVEY, UK MAX PLANCK INST, GERMANY IF 4.68 TC 28 UR https://archimer.ifremer.fr/doc/00140/25170/23276.pdf LA English DT Article CR OISO 8 OISO1 OISO2 OISO3-NIVMER98 OISO4 (VT 46) OISO5 (VT 49) VT 105 / OISO 17 VT 108 / OISO-18 VT 114 / OISO-19 VT 117 / OISO-20 VT 120 / OISO-21 VT 51 / OISO 6 VT 57 / OISO 9 VT 60 / CARAUS - OISO 10 VT 62 / CARAUS - OISO 11 VT 79 / OISO 12 VT 80 / OISO 13 VT 81 / OISO 14 VT 85 / OISO 15 VT 94 / OISO 16 BO Marion Dufresne AB Understanding the variability and coherence of surface ocean pCO2 on a global scale can provide insights into its physical and biogeochemical drivers and inform future samplings strategies and data assimilation methods. We present temporal and spatial autocorrelation analyses of surface ocean pCO2on a 5° × 5° grid using the Lamont-Doherty Earth Observatory database. The seasonal cycle is robust with an interannual autocorrelation of ∼0.4 across multiple years. The global median spatial autocorrelation (e-folding) length is 400 ± 250 km, with large variability across different regions. Autocorrelation lengths of up to 3,000 km are found along major currents and basin gyres while autocorrelation lengths as low as 50 km are found in coastal regions and other areas of physical turbulence. Zonal (east–west) autocorrelation lengths are typically longer than their meridional counterparts, reflecting the zonal nature of many major ocean features. Uncertainties in spatial autocorrelation in different ocean basins are between 42% and 73% of the calculated decorrelation length. The spatial autocorrelation length in air-sea fluxes is much shorter than forpCO2 (200 ± 150 km) due to the high variability of the gas transfer velocity. PY 2012 PD JUL SO Global Biogeochemical Cycles SN 0886-6236 PU Amer Geophysical Union VL 26 IS GB2042, UT 000305992200001 BP 1 EP 12 DI 10.1029/2010GB004017 ID 25170 ER EF