1 / 15

A-SCOPE A dvanced S pace C arbon and Climate O bservation of P lanet E arth

A-SCOPE A dvanced S pace C arbon and Climate O bservation of P lanet E arth. MAG : F.M. Breon, H. Dolman, G. Ehret, P. Flamant, N. Gruber, S. Houweling , M. Scholze, R.T. Menzies and P. Ingmann (ESA). Overview of existing / planned missions What is a Lidar? Why a CO 2 Lidar?

reed
Download Presentation

A-SCOPE A dvanced S pace C arbon and Climate O bservation of P lanet E arth

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A-SCOPEAdvanced Space Carbon and Climate Observationof Planet Earth MAG: F.M. Breon, H. Dolman, G. Ehret, P. Flamant, N. Gruber, S. Houweling, M. Scholze, R.T. Menzies and P. Ingmann (ESA)

  2. Overview of existing / planned missions What is a Lidar? Why a CO2 Lidar? Instrument requirements Outline

  3. Thermal IR: NOAA-TOVS, AIRS, IASI Near IR: SCIAMACHY OCO (2009), GOSAT (2009) Near IR: A-SCOPE; candidate ESA Earth explorer mission (~2015) CO2 from space: Existing and planned missions Passive Active

  4. CO2 Lidar Contextual camera (TBC) Altimeter: Canopy height distribution (TBC) A-SCOPE payload

  5. Measurement Principle Active: Laser + Receiver - Lidar: Light Detection and Ranging • Differential Absorption Lidar • (DIAL) • 2-3 wavelengths as probe • (on) and reference (off)

  6. Sampling approach - Measurements accumulated and averaged over a 50 km interval 50km • on in the wing of an absorption • line to optimize the sensitivity to • surface • Dusk - dawn orbit • (diurnal cycle amplitude) <100m

  7. versus thermal IR: - high surface sensitivity versus near IR: - eliminates the influence of thin cloud layers and aerosols - measures during nighttime Advantage over passive systems

  8. Path > l Path = 0 Path < l Path = l How do aerosols affect CO2?

  9. Modelled aerosol error Annual mean Houweling et al. (ACP, 2005)

  10. SCIAMACHY CO2 Annual mean … OCO: Can handle aerosols much better than SCIAMACHY

  11. Target requirement on surface flux estimation (level 3): 0.02 PgC/yr over 106 km2 (or ~ 50% of the annual flux) CO2 Lidar: Accuracy requirements

  12. Inverse modelling simulations Translation to XCO2 (level 2) Required precision: 0.5 - 1.5 ppm Systematic error: 10% of precision

  13. Canopy Lidar Canopy height distribution Harding & Carabajal (GRL, 2005)

  14. CO2 study:‘Observation Techniques and Mission Concepts for Analysis of the Global Carbon Cycle’ Other activities: study regarding 1.6 and 2.0 micron observations of relevant lidar reflectivities study regarding the diurnal cycle of carbon dioxide study addressing instrument requirements for CCDAS Supporting activities

  15. A-SCOPE is a mission aiming at the monitoring of spatial and temporal gradients of atmospheric CO2 globally. A potentially complementary objective of the mission is the measurement of canopy height distribution. Cloud and aerosol information will be provided as a “by-product”. Conclusions

More Related