Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Samuel Hammer"'
Autor:
Giulia Zazzeri, Heather Graven, Xiaomei Xu, Eric Saboya, Liam Blyth, Alistair J. Manning, Hannah Chawner, Dien Wu, Samuel Hammer
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 15, Pp n/a-n/a (2023)
Abstract Radiocarbon (14C) is a powerful tracer of fossil emissions because fossil fuels are entirely depleted in 14C, but observations of 14CO2 and especially 14CH4 in urban regions are sparse. We present the first observations of 14C in both methan
Externí odkaz:
https://doaj.org/article/6a9a2e54b9dd40578cab85e255502e74
Publikováno v:
Tellus: Series B, Chemical and Physical Meteorology, Vol 65, Iss 0, Pp 1-7 (2013)
Long-term measurements of atmospheric Δ14CO2 from two monitoring stations, one in the European Alps (Jungfraujoch, Switzerland) and the other in the Black Forest (Schauinsland, Germany), are presented. Both records show a steady decrease, changing f
Externí odkaz:
https://doaj.org/article/c27b54c4ec8844f0a2dc14ae287dfd55
Autor:
Felix R. Vogel, Balendra Thiruchittampalam, Jochen Theloke, Roberto Kretschmer, Christoph Gerbig, Samuel Hammer, Ingeborg Levin
Publikováno v:
Tellus: Series B, Chemical and Physical Meteorology, Vol 65, Iss 0, Pp 1-16 (2013)
Quantifying carbon dioxide emissions from fossil fuel burning (FFCO2) is a crucial task to assess continental carbon fluxes and to track anthropogenic emissions changes in the future. In the present study, we investigate potentials and challenges whe
Externí odkaz:
https://doaj.org/article/bfab11abaa034e2cac53715046dd73e2
Publikováno v:
Geoscientific Model Development
An appropriate representation of point source emissions in atmospheric transport models is very challenging. In the Stochastic Time-Inverted Lagrangian Transport model (STILT), all point source emissions are typically released from the surface, meani
Autor:
Michael Steiner, Wouter Peters, Ingrid Luijkx, Stephan Henne, Huilin Chen, Samuel Hammer, Dominik Brunner
Publikováno v:
eISSN
We present the first application of the atmospheric chemistry and transport model ICON-ART in inverse modelling of greenhouse gas fluxes with an Ensemble Kalman Filter. For this purpose, we extended ICON-ART to efficiently handle gridded emissions, g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9d026c56a8979a471db7c942b379de5
https://egusphere.copernicus.org/preprints/2023/egusphere-2023-853/
https://egusphere.copernicus.org/preprints/2023/egusphere-2023-853/
Autor:
Ingeborg Levin, Scott J. Lehman, Quan Hua, Samuel Hammer, Jonathan G. Palmer, John B. Miller, Guaciara M. Santos, Andrzej Z. Rakowski, Jocelyn Turnbull, Ricardo De Pol-Holz, Chris S. M. Turney, Santiago Ancapichún
Publikováno v:
Radiocarbon. 64:723-745
This paper presents a compilation of atmospheric radiocarbon for the period 1950–2019, derived from atmospheric CO2 sampling and tree rings from clean-air sites. Following the approach taken by Hua et al. (2013), our revised and extended compilatio
Autor:
Carlos Gómez-Ortiz, Guillaume Monteil, Ute Karstens, Sourish Basu, Samuel Hammer, Marko Scholze
The concentration of atmospheric carbon dioxide (CO2) has increased since the pre-industrial era (1750) due to human activity leading to a warming of the global land and ocean surface of 1.0 ± 0.2 ºC over the last 30 years could reach 1.5 ºC betwe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96597a5ff0825f35e47b0a412874a0ac
https://doi.org/10.5194/egusphere-egu22-12406
https://doi.org/10.5194/egusphere-egu22-12406
Autor:
Ingeborg Levin, Samuel Hammer, Bernd Kromer, Susanne Preunkert, Rolf Weller, Douglas E Worthy
Publikováno v:
EPIC3Radiocarbon, UNIV ARIZONA DEPT GEOSCIENCES, 64, pp. 781-791, ISSN: 0033-8222
Radiocarbon
Radiocarbon, 2022, 64 (4), pp.781-791. ⟨10.1017/RDC.2021.102⟩
Radiocarbon
Radiocarbon, 2022, 64 (4), pp.781-791. ⟨10.1017/RDC.2021.102⟩
Since the 1950s, observations of radiocarbon (14C) in tropospheric carbon dioxide (CO2) have been conducted in both hemispheres, documenting the so-called nuclear “bomb spike” and its transfer into the oceans and the terrestrial biosphere, the tw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7e5f5b34aa8cb2d1e6e4b26dd0a5150
https://hdl.handle.net/10013/epic.e65dcee8-3460-48a1-84e0-8b686fd6056d
https://hdl.handle.net/10013/epic.e65dcee8-3460-48a1-84e0-8b686fd6056d
Autor:
Julian DellaColetta, Samuel Hammer, Maksym Gachkivskyi, Ute Karstens, Fabian Maier, Ingeborg Levin
Correlations of night-time atmospheric methane (CH4) and 222Radon (222Rn) observations in Heidelberg, Germany, were evaluated with the Radon Tracer Method (RTM) to estimate the trend of annual CH4 emissions from 1996–2020 in the catchment area of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfd3cfdd32e7dc84b7cf072e6542da7b
https://acp.copernicus.org/preprints/acp-2021-661/
https://acp.copernicus.org/preprints/acp-2021-661/
High-resolution monitoring is the basis for CO2 emissions tracking and attribution in urban areas. This work is an important step towards an integrated urban CO2 emissions monitoring system. Three middle-cost nondispersive infrared (NDIR) sensors of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::625041a27c0f2302c58947fdd8d88605
https://doi.org/10.5194/egusphere-egu21-2724
https://doi.org/10.5194/egusphere-egu21-2724