Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD031400 |
Evaluation of OCO-2 X-CO2 Variability at Local and Synoptic Scales using Lidar and In Situ Observations from the ACT-America Campaigns | |
Bell, Emily1; 39;Dell, Christopher W.2 | |
2020-05-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2020 |
卷号 | 125期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | With nearly 1 million observations of column-mean carbon dioxide concentration (X-CO2) per day, the Orbiting Carbon Observatory 2 (OCO-2) presents exciting possibilities for monitoring the global carbon cycle, including the detection of subcontinental column CO2 variations. While the OCO-2 data set has been shown to achieve target precision and accuracy on a single-sounding level, the validation of X-CO2 spatial gradients on subcontinental scales remains challenging. In this work, we investigate the use of an integrated path differential absorption (IPDA) lidar for evaluation of OCO-2 observations via NASA's Atmospheric Carbon and Transport (ACT)-America project. The project has completed eight clear-sky underflights of OCO-2 with the Multifunctional Fiber Laser Lidar (MFLL)-along with a suite of in situ instruments-giving a precisely colocated, high-resolution validation data set spanning nearly 3,800 km across four seasons. We explore the challenges and opportunities involved in comparing the MFLL and OCO-2 X-CO2 data sets and evaluate their agreement on synoptic and local scales. We find that OCO-2 synoptic-scale gradients generally agree with those derived from the lidar, typically to +/- 0.1 ppm per degree latitude for gradients ranging in strength from 0 to 1 ppm per degree latitude. CO2 reanalysis products also typically agree to +/- 0.25 ppm per degree when compared with an in situ-informed CO2 "curtain." Real X-CO2 features at local scales, however, remain challenging to observe and validate from space, with correlation coefficients typically below 0.35 between OCO-2 and the MFLL. Even so, ACT-America data have helped investigate interesting local X-CO2 patterns and identify systematic spurious cloud-related features in the OCO-2 data set. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000537788100010 |
WOS关键词 | ORBITING CARBON OBSERVATORY-2 ; ATMOSPHERIC CO2 INVERSIONS ; DIOXIDE ; RETRIEVALS ; TRANSPORT ; SYSTEMS ; BUDGET |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280247 |
专题 | 气候变化 |
作者单位 | 1.Colorado State Univ, Cooperat Inst Res Atmosphere, Ft Collins, CO 80523 USA; 2.Penn State Univ, Dept Meteorol & Atmospher Sci, Earth & Environm Syst Inst, University Pk, PA 16802 USA; 3.NASA, Langley Res Ctr, Hampton, VA 23665 USA; 4.Spectral Sensor Solut LLC, Ft Wayne, IN USA; 5.L3Harris Technol, Ft Wayne, IN USA; 6.Texas Tech Univ, Dept Geosci, Atmospher Sci Div, Lubbock, TX 79409 USA; 7.Univ Space Res Assoc, Columbia, MD USA; 8.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA |
推荐引用方式 GB/T 7714 | Bell, Emily,39;Dell, Christopher W.. Evaluation of OCO-2 X-CO2 Variability at Local and Synoptic Scales using Lidar and In Situ Observations from the ACT-America Campaigns[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(10). |
APA | Bell, Emily,&39;Dell, Christopher W..(2020).Evaluation of OCO-2 X-CO2 Variability at Local and Synoptic Scales using Lidar and In Situ Observations from the ACT-America Campaigns.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(10). |
MLA | Bell, Emily,et al."Evaluation of OCO-2 X-CO2 Variability at Local and Synoptic Scales using Lidar and In Situ Observations from the ACT-America Campaigns".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.10(2020). |
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