...the who's who,
and the what's what 
of the space industry

Space Careers

news Space News

Search News Archive

Title

Article text

Keyword

  • Home
  • News
  • A new TanSat XCO2 global product for climate studies

A new TanSat XCO2 global product for climate studies

Written by  Wednesday, 30 December 2020 06:09
Write a comment
Beijing, China (SPX) Dec 31, 2020
Since CO2 has been recognized as the most important anthropogenic greenhouse gas owing to its significant impact on global warming and climate change, there have been a substantial number of studies that have focused on investigating the status of CO2 in the atmosphere in the past and present, and how it will change in the future. The United Nations Climate Change Conference (24th Conferen

Since CO2 has been recognized as the most important anthropogenic greenhouse gas owing to its significant impact on global warming and climate change, there have been a substantial number of studies that have focused on investigating the status of CO2 in the atmosphere in the past and present, and how it will change in the future.

The United Nations Climate Change Conference (24th Conference of the Parties, COP24) will conduct a climate change action global stock-take for each of five years starting in 2023. Therefore, in support of these efforts, we need a new method to verify how much human emissions impact the global carbon cycle and climate change.

The 1st Chinese Carbon Dioxide Monitoring Satellite Mission, known as TanSat, which was supported by the Ministry of Science and Technology of China, the Chinese Academy of Sciences, and the China Meteorological Administration, launched in December 2016 for the purpose of monitoring CO2 concentrations in the atmosphere over the globe. The 1st TanSat global map of CO2 dry-air mixing ratio (XCO2) measurements over land was released as a version-1 data product with an accuracy of 2.11 ppmv (parts per million by volume).

"Unfortunately, it is not accurate enough to support estimation of anthropogenic CO2 emissions in cities due to it having a 1-1.5 ppm gradient across urban areas, as shown from ground-based measurement in Paris," explains Dongxu Yang, a scientist with the Institute of Atmospheric Physics, Chinese Academy of Sciences (IAP/CAS), who is closely involved in TanSat data retrieval. "On TanSat's 4th birthday coming this year, we will introduce a new version [version 2] of the TanSat global XCO2 product."

The new TanSat global XCO2 product is retrieved by IAPCAS (the Institute of Atmospheric Physics Carbon Dioxide Retrieval Algorithm for Satellite Remote Sensing), and the European Space Agency (ESA) Climate Change Initiative plus (CCI+) TanSat XCO2 product is retrieved by the University of Leicester Full Physics (UoL-FP) retrieval algorithm.

The new TanSat XCO2 data product is now retrieved by IAP/CAS using the O2 A-band and CO2 weak band together, after a new approach has been developed to improve the retrieval accuracy by optimizing the TanSat measured spectrum. The TanSat v2 XCO2 data product can be obtained from the CASA (the Cooperation on the Analysis of carbon SAtellites data) TanSat data and science service.

Intercomparison of TanSat XCO2 retrieval between the two algorithms shows good agreement for global Total Column Carbon Observing Network (TCCON) overpass measurements with 34,699 individual measurements. The dispersion between the two data products has a standard deviation of 1.28 ppmv, and there is also a -0.35 ppmv overall bias between both. These intercomparison results are introduced in a recently published paper in Advances in Atmospheric Sciences.

In January 2020, a protocol was signed between the National Remote Sensing Center of the China Ministry of Science and Technology of China (MOST/NRSCC) and ESA regarding the intended coordination of their activities in the Remote Sensing of Greenhouse Gases and Related Missions. MOST/NRSCC and ESA intend TanSat to be a third-party mission of ESA, and TanSat data have been included in key ESA programs such as the Climate Change Initiative plus (CCI+) and Earthnet Data Assessment Pilot (EDAP).

The new dataset will be involved in global carbon flux estimations and climate studies in the near future. The TanSat mission will never stop, and developments are required in future generations of TanSat missions to contribute further to global stock-take and carbon-neutral research.

Research paper


Related Links
Institute Of Atmospheric Physics, Chinese Academy Of Sciences
Earth Observation News - Suppiliers, Technology and Application

Tweet

Thanks for being there;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Monthly Supporter
$5+ Billed Monthly

SpaceDaily Contributor
$5 Billed Once

credit card or paypal



EARTH OBSERVATION
DLR study investigates mobility in the renewed lockdown
Berlin, Germany (SPX) Dec 25, 2020
How has mobility behaviour in Germany changed since the renewed coronavirus lockdown? The German Aerospace Center (Deutsches Zentrum fur Luft- und Raumfahrt; DLR) has investigated this topic in a study. From late November to early December, DLR scientists surveyed approximately 1000 people for the third time; the participants were chosen to cover a representative spread of the population. As in the first two surveys, which were conducted in spring and summer 2020, the scientists were interested in respo ... read more


Read more from original source...

You must login to post a comment.
Loading comment... The comment will be refreshed after 00:00.

Be the first to comment.

CONTACT THE AUTHOR

* Denotes Required Field
Personal information
Message

Interested in Space?

Hit the buttons below to follow us...