| タイトル | Aspects of spatial and temporal aggregation in estimating regional carbon dioxide fluxes from temperate forest soils |
| 著者（英） | Peterjohn, William T.; Mcguire, A. David; Melillo, Jerry M.; Kicklighter, David W.; Steudler, Paul A.; Aber, John D.; Rastetter, Edward B. |
| 著者所属（英） | NASA |
| 発行日 | 1994-01-20 |
| 言語 | eng |
| 内容記述 | We examine the influence of aggregation errors on developing estimates of regional soil-CO2 flux from temperate forests. We find daily soil-CO2 fluxes to be more sensitive to changes in soil temperatures (Q(sub 10) = 3.08) than air temperatures (Q(sub 10) = 1.99). The direct use of mean monthly air temperatures with a daily flux model underestimates regional fluxes by approximately 4%. Temporal aggregation error varies with spatial resolution. Overall, our calibrated modeling approach reduces spatial aggregation error by 9.3% and temporal aggregation error by 15.5%. After minimizing spatial and temporal aggregation errors, mature temperate forest soils are estimated to contribute 12.9 Pg C/yr to the atmosphere as carbon dioxide. Georeferenced model estimates agree well with annual soil-CO2 fluxes measured during chamber studies in mature temperate forest stands around the globe. |
| NASA分類 | METEOROLOGY AND CLIMATOLOGY |
| レポートNO | 95A62845 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/310892 |
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