Aerosols, Cloud Microphysics, and Fractional Cloudiness

Albrecht, Bruce A.

doi:10.1126/science.245.4923.1227

Cited by 3,713 publications

(3,027 citation statements)

References 30 publications

Supporting

Mentioning

2,773

Contrasting

Unclassified

Order By: Relevance

“…Aerosols iii directly influence the Earth's radiation balance directly by scattering incoming radiation back to space (Charlson et al 1991(Charlson et al , 1992 or indirectly by influencing cloud reflectivity and persistence (Twomey 1977;Albrecht 1989). Aerosols can also influence the hydrological cycle by altering the mechanisms that form precipitation in clouds (Ferek et al 2000;Rosenfeld 2000).…”

Section: Aerosol Loadingmentioning

confidence: 99%

A safe operating space for humanity

Rockström

Steffen

Noone

et al. 2009

Nature

9,415

5,320

View full text Add to dashboard Cite

The article presents a study that investigates on the importance of identifying and quantifying planetary boundaries to prevent human activities in affecting environmental condition. The author states the industrial revolution and advancement in human civilization has caused the unstability of the environmental state that is less conducive for humans to live and affect their health condition. The author notes that planetary boundaries served a control variables to secure the safety of its citizen as well as protect the environment from shifting to dangerous levels. It also cites the different planetary boundaries, along with its impact on climate change and Earth system degradation

show abstract

Section: Aerosol Loadingmentioning

confidence: 99%

A safe operating space for humanity

Rockström

Steffen

Noone

et al. 2009

Nature

9,415

5,320

View full text Add to dashboard Cite

show abstract

“…The initiation of collision-coalescence is delayed in polluted clouds (Gunn and Phillips, 1957;Squires, 1958;Albrecht, 1989). This drives a delay in rain formation and can affect the amount of surface rain (Rosenfeld, 1999(Rosenfeld, , 2000Cheng et al, 2007;Khain, 2009;Levin and Cotton, 2009;Koren et al, 2012;Hazra et al, 2013a, b;Dagan et al, 2015b).…”

Section: Introductionmentioning

confidence: 99%

Time-dependent, non-monotonic response of warm convective cloud fields to changes in aerosol loading

et al. 2017

View full text Add to dashboard Cite

Abstract. Large eddy simulations (LESs) with bin microphysics are used here to study cloud fields' sensitivity to changes in aerosol loading and the time evolution of this response. Similarly to the known response of a single cloud, we show that the mean field properties change in a nonmonotonic trend, with an optimum aerosol concentration for which the field reaches its maximal water mass or rain yield. This trend is a result of competition between processes that encourage cloud development versus those that suppress it. However, another layer of complexity is added when considering clouds' impact on the field's thermodynamic properties and how this is dependent on aerosol loading. Under polluted conditions, rain is suppressed and the non-precipitating clouds act to increase atmospheric instability. This results in warming of the lower part of the cloudy layer (in which there is net condensation) and cooling of the upper part (net evaporation). Evaporation at the upper part of the cloudy layer in the polluted simulations raises humidity at these levels and thus amplifies the development of the next generation of clouds (preconditioning effect). On the other hand, under clean conditions, the precipitating clouds drive net warming of the cloudy layer and net cooling of the sub-cloud layer due to rain evaporation. These two effects act to stabilize the atmospheric boundary layer with time (consumption of the instability). The evolution of the field's thermodynamic properties affects the cloud properties in return, as shown by the migration of the optimal aerosol concentration toward higher values.

show abstract

“…It is important to assess the impact of HNO 3 modulation of the activation process for the ubiquitous acidic aerosols in the atmosphere, . This model has been modified to include the warm rain formation process and thus can also be utilized to assess the impact of gas absorption on precipitation formation and the so-called indirect aerosol forcing of the second kind [Albrecht, 1989;Lohmann and Feichter, 1997]. Two basic scenarios are used in the assessment presented here, a mildly polluted continental case and a relatively pristine marine case.…”

Section: Introductionmentioning

confidence: 99%

Impact of gas‐phase HNO₃ and NH₃ on microphysical processes in atmospheric clouds

Hegg¹

2000

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

Aerosols, Cloud Microphysics, and Fractional Cloudiness

Cited by 3,713 publications

References 30 publications

A safe operating space for humanity

A safe operating space for humanity

Time-dependent, non-monotonic response of warm convective cloud fields to changes in aerosol loading

Impact of gas‐phase HNO₃ and NH₃ on microphysical processes in atmospheric clouds

Contact Info

Product

Resources

About

Aerosols, Cloud Microphysics, and Fractional Cloudiness

Cited by 3,713 publications

References 30 publications

A safe operating space for humanity

A safe operating space for humanity

Time-dependent, non-monotonic response of warm convective cloud fields to changes in aerosol loading

Impact of gas‐phase HNO3 and NH3 on microphysical processes in atmospheric clouds

Contact Info

Product

Resources

About

Impact of gas‐phase HNO₃ and NH₃ on microphysical processes in atmospheric clouds