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  • 1
    Online Resource
    Online Resource
    High Definition Clouds and Precipitation for Climate Prediction (HD(CP)2) : Abschlussbericht : (HD(CP)2) - Verbundprojekt S1 - Diagnostik : Projektlaufzeit 1. Oktober 2012 - 30. September 2015, verlängert bis 31. März 2016 (2016)
    [Oberpfaffenhofen] : [Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Institut für Physik der Atmosphäre]
    Details Availability
    Keywords: Forschungsbericht ; Klima ; Modell ; Wolke
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (30 Seiten, 1,43 MB) , Illustrationen, Diagramme
    URL: https://edocs.tib.eu/files/e01fb17/887663710.pdf
    URL: https://doi.org/10.2314/GBV:887663710
    DOI: 10.2314/GBV:887663710
    Language: German
    Note: Förderkennzeichen BMBF 01LK1213A-D. - Verbund-Nummer 01126646 , Autoren dem Berichtsblatt entnommen , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Mit deutscher und englischer Zusammenfassung , Im Titel ist "2" in HD(CP)2 hochgestellt
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  • 2
    Online Resource
    Online Resource
    Endbericht (Verbundbericht) für das Verbundvorhaben AIRSPACE (Aircraft remote sensing of greenhouse gases with combined passive and active instruments) : mit den Teilvorhaben: AIRSPACE-LIFE, Laufzeit: 1.4.2017-30.9.2021; AIRSPACE-MAMAP2D, Laufzeit: 1.4.2017-30.06.2022; AIRSPACE-JIGIT, Laufzeit: 1.4.2017-30.09.2021 (2022)
    Oberpfaffenhofen : Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre
    Details Availability
    Keywords: Forschungsbericht ; Fernerkundung ; Atmosphäre ; Treibhausgas
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (86 Seiten, 7,76 MB) , Illustrationen, Diagramme, Karten
    URL: https://doi.org/10.2314/KXP:1853918903
    URL: https://edocs.tib.eu/files/e01fb23/1853918903.pdf
    DOI: 10.2314/KXP:1853918903
    Language: German , English
    Note: Förderkennzeichen BMBF 01LK1701A-C , Verbundnummer 01177654 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Sprache der Zusammenfassungen: Deutsch, Englisch
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  • 3
    Electronic Resource
    Electronic Resource
    Atmospheric chemistry Natural bleach under scrutiny (2005)
    [s.l.] : Nature Publishing Group
    Nature 436 (2005), S. 921-922 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As Martin Manning and colleagues report on page 1001 of this issue, changes in the amount of hydroxyl (OH) radicals in Earth's atmosphere can be tracked by analysing time-series measurements of naturally produced carbon monoxide containing radiocarbon (14CO). This is no mean feat and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/436921a
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    Paper (German National Licenses)
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  • 4
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    Fluxes and 13C/12C ratios of reactive gas emissions from EMAC EVAL2 set-up, link to files in NetCDF format (2017)
    PANGAEA
    In:  Supplement to: Gromov, Sergey; Brenninkemeijer, Carl A M; Jöckel, Patrick (2017): Uncertainties of fluxes and 13C/12C ratios of atmospheric reactive-gas emissions. Atmospheric Chemistry and Physics, 17(13), 8525-8552, https://doi.org/10.5194/acp-17-8525-2017
    Details
    Publication Date: 2023-07-05
    Description: We provide the estimate of the fluxes and 13C/12C ratios of a suite of reactive carbonaceous compounds emitted into the atmosphere. The data are based on an evaluated set-up of the EMAC model (EVAL2, doi:10.5194/gmd-3-717-2010). Please refer to the cited publication for details. Emission sources are integrated into the anthropogenic (ANT), biogenic (BIO) and biomass burning (BB) categories. On-line calculated emissions (e.g. C5H8) and pseudo-emission (nudging) data are not included. The ANT and BIO emissions refer to the year 2000, the BB emissions span the 1997-2005 period. Data for each category is encapsulated in a separate NetCDF file (ver. 4).
    Type: Dataset
    Format: application/zip, 195.6 MBytes
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    DATA PANGAEA
  • 5
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    MERLIN: A French-German Space Lidar Mission Dedicated to Atmospheric Methane (2017)
    In:  EPIC3Remote Sensing, 9(10), pp. 1052
    Details
    Publication Date: 2020-06-14
    Description: The MEthane Remote sensing Lidar missioN (MERLIN) aims at demonstrating the spaceborne active measurement of atmospheric methane, a potent greenhouse gas, based on an Integrated Path Differential Absorption (IPDA) nadir-viewing LIght Detecting and Ranging (Lidar) instrument. MERLIN is a joint French and German space mission, with a launch currently scheduled for the timeframe 2021/22. The German Space Agency (DLR) is responsible for the payload, while the platform (MYRIADE Evolutions product line) is developed by the French Space Agency (CNES). The main scientific objective of MERLIN is the delivery of weighted atmospheric columns of methane dry-air mole fractions for all latitudes throughout the year with systematic errors small enough (〈3.7 ppb) to significantly improve our knowledge of methane sources from global to regional scales, with emphasis on poorly accessible regions in the tropics and at high latitudes. This paper presents the MERLIN objectives, describes the methodology and the main characteristics of the payload and of the platform, and proposes a first assessment of the error budget and its translation into expected uncertainty reduction of methane surface emissions.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    PAPER (OA)
  • 6
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    A very limited role of tropospheric chlorine as a sink of the greenhouse gas methane (2018)
    Copernicus Publications (EGU)
    In:  Atmospheric Chemistry and Physics, 18 . pp. 9831-9843.
    Details
    Publication Date: 2021-02-08
    Description: Unexpectedly large seasonal phase differences between CH4 concentration and its 13C∕12C isotopic ratio and their inter-annual variations observed in southern hemispheric time series have been attributed to the Cl+CH4 reaction, in which 13CH4 is discriminated strongly compared to OH+CH4, and have provided the only (indirect) evidence of a hemispheric-scale presence of oxidative cycle-relevant quantities of tropospheric atomic Cl. Our analysis of concurrent New Zealand and Antarctic time series of CH4 and CO mixing and isotope ratios shows that a corresponding 13C∕12C variability is absent in CO. Using the AC-GCM EMAC model and isotopic mass balancing for comparing the periods of presumably high and low Cl, it is shown that variations in extra-tropical Southern Hemisphere Cl cannot have exceeded 0.9 × 103atomscm−3. It is demonstrated that the 13C∕12C ratio of CO is a sensitive indicator for the isotopic composition of reacted CH4 and therefore for its sources. Despite ambiguities about the yield of CO from CH4 oxidation (with this yield being an important factor in the budget of CO) and uncertainties about the isotopic composition of sources of CO (in particular biomass burning), the contribution of Cl to the removal of CH4 in the troposphere is probably much lower than currently assumed.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    DOI: 10.5194/acp-2018-188
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    Brominated VSLS and their influence on ozone under a changing climate (2017)
    Copernicus Publications (EGU)
    In:  Atmospheric Chemistry and Physics, 17 (18). pp. 11313-11329.
    Details
    Publication Date: 2020-02-06
    Description: Very short-lived substances (VSLS) contribute as source gases significantly to the tropospheric and stratospheric bromine loading. At present, an estimated 25% of stratospheric bromine is of oceanic origin. In this study, we investigate how climate change may impact the ocean- atmosphere flux of brominated VSLS, their atmospheric transport, and chemical transformations and evaluate how these changes will affect stratospheric ozone over the 21st century. Under the assumption of fixed ocean water concentrations and RCP6.0 scenario, we find an increase of the ocean- atmosphere flux of brominated VSLS of about 8-10% by the end of the 21st century compared to present day. A decrease in the tropospheric mixing ratios of VSLS and an increase in the lower stratosphere are attributed to changes in atmospheric chemistry and transport. Our model simulations reveal that this increase is counteracted by a corresponding reduction of inorganic bromine. Therefore the total amount of bromine from VSLS in the stratosphere will not be changed by an increase in upwelling. Part of the increase of VSLS in the tropical lower stratosphere results from an increase in the corresponding tropopause height. As the depletion of stratospheric ozone due to bromine depends also on the availability of chlorine, we find the impact of bromine on stratospheric ozone at the end of the 21st century reduced compared to present day. Thus, these studies highlight the different factors influencing the role of brominated VSLS in a future climate
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    DOI: 10.5194/acp-17-11313-2017
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 8
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    The representation of solar cycle signals in stratospheric ozone. Part II: Analysis of global models (2018)
    Copernicus Publications (EGU)
    In:  Atmospheric Chemistry and Physics, 18 . pp. 11323-11343.
    Details
    Publication Date: 2021-02-08
    Description: The impact of changes in incoming solar irradiance on stratospheric ozone abundances should be included in climate simulations to aid in capturing the atmospheric response to solar cycle variability. This study presents the first systematic comparison of the representation of the 11-year solar cycle ozone response (SOR) in chemistry–climate models (CCMs) and in pre-calculated ozone databases specified in climate models that do not include chemistry, with a special focus on comparing the recommended protocols for the Coupled Model Intercomparison Project Phase 5 and Phase 6 (CMIP5 and CMIP6). We analyse the SOR in eight CCMs from the Chemistry–Climate Model Initiative (CCMI-1) and compare these with results from three ozone databases for climate models: the Bodeker Scientific ozone database, the SPARC/Atmospheric Chemistry and Climate (AC&C) ozone database for CMIP5 and the SPARC/CCMI ozone database for CMIP6. The peak amplitude of the annual mean SOR in the tropical upper stratosphere (1–5hPa) decreases by more than a factor of 2, from around 5 to 2%, between the CMIP5 and CMIP6 ozone databases. This substantial decrease can be traced to the CMIP5 ozone database being constructed from a regression model fit to satellite and ozonesonde measurements, while the CMIP6 database is constructed from CCM simulations. The SOR in the CMIP6 ozone database therefore implicitly resembles the SOR in the CCMI-1 models. The structure in latitude of the SOR in the CMIP6 ozone database and CCMI-1 models is considerably smoother than in the CMIP5 database, which shows unrealistic sharp gradients in the SOR across the middle latitudes owing to the paucity of long-term ozone measurements in polar regions. The SORs in the CMIP6 ozone database and the CCMI-1 models show a seasonal dependence with enhanced meridional gradients at mid- to high latitudes in the winter hemisphere. The CMIP5 ozone database does not account for seasonal variations in the SOR, which is unrealistic. Sensitivity experiments with a global atmospheric model without chemistry (ECHAM6.3) are performed to assess the atmospheric impacts of changes in the representation of the SOR and solar spectral irradiance (SSI) forcing between CMIP5 and CMIP6. The larger amplitude of the SOR in the CMIP5 ozone database compared to CMIP6 causes a likely overestimation of the modelled tropical stratospheric temperature response between 11-year solar cycle minimum and maximum by up to 0.55K, or around 80% of the total amplitude. This effect is substantially larger than the change in temperature response due to differences in SSI forcing between CMIP5 and CMIP6. The results emphasize the importance of adequately representing the SOR in global models to capture the impact of the 11-year solar cycle on the atmosphere. Since a number of limitations in the representation of the SOR in the CMIP5 ozone database have been identified, we recommend that CMIP6 models without chemistry use the CMIP6 ozone database and the CMIP6 SSI dataset to better capture the climate impacts of solar variability. The SOR coefficients from the CMIP6 ozone database are published with this paper.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    DOI: 10.5194/acp-18-11323-2018
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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