Zobrazeno 1 - 10
of 615
pro vyhledávání: '"QUAAS, JOHANNES"'
Autor:
Sudhakar, Dipu, Quaas, Johannes
The marine stratocumulus clouds are highly sensitive to aerosol perturbations. In this study, we have explored the cloud susceptibility to aerosol using satellite observation and multi-model simulations over the Southeast Pacific Ocean (SEP). The cli
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A85688
https://ul.qucosa.de/api/qucosa%3A85688/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A85688/attachment/ATT-0/
Autor:
Christensen, Matthew W., Gettelman, Andrew, Cermak, Jan, Dagan, Guy, Diamond, Michael, Douglas, Alyson, Feingold, Graham, Glassmeier, Franziska, Goren, Tom, Grosvenor, Daniel P., Gryspeerdt, Edward, Kahn, Ralph, Li, Zhanqing, Ma, Po-Lun, Malavelle, Florent, McCoy, Isabel L., McCoy, Daniel T., McFarquhar, Greg, Mülmenstädt, Johannes, Pal, Sandip, Possner, Anna, Povey, Adam, Quaas, Johannes, Rosenfeld, Daniel, Schmidt, Anja, Schrödner, Roland, Sorooshian, Armin, Stier, Philip, Toll, Velle, Watson-Parris, Duncan, Wood, Robert, Yang, Mingxi, Yuan, Tianle
Aerosol–cloud interactions (ACIs) are considered to be the most uncertain driver of present-day radiative forcing due to human activities. The nonlinearity of cloud-state changes to aerosol perturbations make it challenging to attribute causality i
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A82040
https://ul.qucosa.de/api/qucosa%3A82040/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A82040/attachment/ATT-0/
Autor:
Dipu, Sudhakar, Schwarz, Matthias, Ekman, Annica M. L., Gryspeerdt, Edward, Goren, Tom, Sourdeval, Odran, Mülmenstädt, Johannes, Quaas, Johannes
Important aspects of the adjustments to aerosol-cloud interactions can be examined using the relationship between cloud droplet number concentration (Nd) and liquid water path (LWP). Specifically, this relation can constrain the role of aerosols in l
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A82037
https://ul.qucosa.de/api/qucosa%3A82037/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A82037/attachment/ATT-0/
Aerosol–cloud interaction is the most uncertain component of the overall anthropogenic forcing of the climate, in which cloud droplet number concentration (Nd) sensitivity to aerosol (S) is a key term for the overall estimation. However, satellite-
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A82031
https://ul.qucosa.de/api/qucosa%3A82031/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A82031/attachment/ATT-0/
Autor:
Quaas, Johannes, Jia, Hailing, Smith, Chris, Albright, Anna Lea, Aas, Wenche, Bellouin, Nicolas, Boucher, Olivier, Doutriaux-Boucher, Marie, Forster, Piers M., Grosvenor, Daniel, Jenkins, Stuart, Klimont, Zbigniew, Loeb, Norman G., Ma, Xiaoyan, Naik, Vaishali, Paulot, Fabien, Stier, Philip, Wild, Martin, Myhre, Gunnar, Schulz, Michael
Anthropogenic aerosols exert a cooling influence that offsets part of the greenhouse gas warming. Due to their short tropospheric lifetime of only several days, the aerosol forcing responds quickly to emissions. Here, we present and discuss the evolu
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A82017
https://ul.qucosa.de/api/qucosa%3A82017/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A82017/attachment/ATT-0/
Aircraft produce condensation trails, which are thought to increase high-level cloudiness under certain conditions. However the magnitude of such an effect and whether this contributes substantially to the radiative forcing due to the aviation sector
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A82006
https://ul.qucosa.de/api/qucosa%3A82006/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A82006/attachment/ATT-0/
Autor:
Quaas, Johannes, Stier, Philip
Publikováno v:
Parameterization of atmospheric convection / Robert S. Plant, Jun-Ichi Yano. Vol 2: Current issues and new theories. World Scientific, Imperial College Press, ISBN 978-1-78326-690-6. :47-58
Parameterization development and evaluation ideally takes a two-step approach (Lohmann et al., 2007). Insight into new processes, and initial parameterization formulation should be guided by theory, process-level observations (laboratory experiments
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A14723
https://ul.qucosa.de/api/qucosa%3A14723/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A14723/attachment/ATT-0/
Autor:
Brückner, Marlen, Lonardi, Michael, Ehrlich, André, Wendisch, Manfred, Jäkel, Evelyn, Schäfer, Michael, Quaas, Johannes, Kalesse, Heike
The thermosphere-ionosphere regions are mainly controlled by the solar, but also by geomagnetic activity. In this case study, the Earth’s ionospheric response to the 25-26 August 2018 intense geomagnetic storm is investigated using the Internationa
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A74381
https://ul.qucosa.de/api/qucosa%3A74381/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A74381/attachment/ATT-0/
Autor:
Quaas, Johannes, Arola, Antti, Cairns, Brian, Christensen, Matthew, Deneke, Hartwig, Ekman, Annica M. L., Feingold, Graham, Fridlind, Ann, Gryspeerdt, Edward, Hasekamp, Otto, Li, Zhanqing, Lipponen, Antti, Ma, Po-Lun, Mülmenstädt, Johannes, Nenes, Athanasios, Penner, Joyce E., Rosenfeld, Daniel, Schrödner, Roland, Sinclair, Kenneth, Sourdeval, Odran, Stier, Philip, Tesche, Matthias, van Diedenhoven, Bastiaan, Wendisch, Manfred
The Twomey effect describes the radiative forcing associated with a change in cloud albedo due to an increase in anthropogenic aerosol emissions. It is driven by the perturbation in cloud droplet number concentration (1Nd; ant) in liquid-water clouds
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A74864
https://ul.qucosa.de/api/qucosa%3A74864/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A74864/attachment/ATT-0/
Autor:
Ribu, Cherian, Quaas, Johannes
Several regions worldwide have seen significant trends in anthropogenic aerosol emissions during the period of detailed satellite observations since 2001. Over Europe (EUR) and North America (NAM) there were strong declines, over China increases then
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A72473
https://ul.qucosa.de/api/qucosa%3A72473/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A72473/attachment/ATT-0/