Search Results - "Kok, F."

An observationally constrained estimate of global dust aerosol optical depth by Ridley, David A, Heald, Colette L, Kok, Jasper F, Zhao, Chun

“…The role of mineral dust in climate and ecosystems has been largely quantified using global climate and chemistry model simulations of dust emission,…”
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scaling theory for the size distribution of emitted dust aerosols suggests climate models underestimate the size of the global dust cycle by Kok, Jasper F

“…Mineral dust aerosols impact Earth's radiation budget through interactions with clouds, ecosystems, and radiation, which constitutes a substantial uncertainty…”
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Does the size distribution of mineral dust aerosols depend on the wind speed at emission? by Kok, J F

“…The size distribution of mineral dust aerosols partially determines their interactions with clouds, radiation, ecosystems, and other components of the Earth…”
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Fundamental Causes of Model Inaccuracies in Predicting Wind‐Blown Sand Fluxes by Chamecki, Marcelo, Kok, Jasper F.

“…The wind‐blown flux of sand generates dunes, wind erosion, and mineral dust aerosols. Existing models predict sand flux using the wind friction velocity that…”
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Contribution of the World's Main Dust Source Regions to the Global Cycle of Desert Dust by Kok, Jasper F., Adebiyi, Adeyemi A., Albani, Samuel, Balkanski, Yves, Checa-Garcia, Ramiro, Chin, Mian, Colarco, Peter R, Hamilton, Douglas S., Huang, Yue, Ito, Akinori, Klose, Martina, Li, Longlei, Mahowald, Natalie M., Miller, Ron L, Obiso, Vincenzo, García-Pando, Carlos Pérez, Lima, Adriana Rocha, Wan, Jessica S.

“…Even though desert dust is the most abundant aerosol by mass in Earth's atmosphere, the relative contributions of the world's major source regions to the…”
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Global and regional importance of the direct dust-climate feedback by Kok, Jasper F., Ward, Daniel S., Mahowald, Natalie M., Evan, Amato T.

“…Feedbacks between the global dust cycle and the climate system might have amplified past climate changes. Yet, it remains unclear what role the dust–climate…”
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Climate models miss most of the coarse dust in the atmosphere by Adebiyi, Adeyemi A, Kok, Jasper F

“…Coarse mineral dust (diameter, ≥5 μm) is an important component of the Earth system that affects clouds, ocean ecosystems, and climate. Despite their…”
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High dietary protein intake, reducing or eliciting insulin resistance? by Rietman, A, Schwarz, J, Tomé, D, Kok, F J, Mensink, M

“…Dietary proteins have an insulinotropic effect and thus promote insulin secretion, which indeed leads to enhanced glucose clearance from the blood. In the long…”
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Less Atmospheric Radiative Heating By Dust Due to the Synergy of Coarser Size and Aspherical Shape by Ito, Akinori, Adebiyi, Adeyemi A., Huang, Yue, Kok, Jasper F.

“…Mineral dust aerosols cool and warm the atmosphere by scattering and absorbing solar (shortwave: SW) and thermal (longwave: LW) radiation. However, significant…”
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Cohesion‐Induced Enhancement of Aeolian Saltation by Comola, F., Gaume, J., Kok, J. F., Lehning, M.

“…The wind‐driven saltation of granular material plays a key role in various geophysical processes on Earth, Mars, Venus, and Titan. Although interparticle…”
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Quantifying the range of the dust direct radiative effect due to source mineralogy uncertainty by Li, Longlei, Mahowald, Natalie M., Miller, Ronald L., García‐Pando, Carlos Pérez, Klose, Martina, Hamilton, Douglas S., Ageitos, Maria Gonçalves, Ginoux, Paul, Balkanski, Yves, Green, Robert O., Kalashnikova, Olga, Kok, Jasper F., Obiso, Vincenzo, Paynter, David, Thompson, David R.

“…The large uncertainty in the mineral dust direct radiative effect (DRE) hinders projections of future climate change due to anthropogenic activity. Resolving…”
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An improved dust emission model – Part 2: Evaluation in the Community Earth System Model, with implications for the use of dust source functions by Kok, J. F, Albani, S, Mahowald, N. M, Ward, D. S

“…The complex nature of mineral dust aerosol emission makes it a difficult process to represent accurately in weather and climate models. Indeed, results in the…”
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Modeling dust as component minerals in the Community Atmosphere Model: development of framework and impact on radiative forcing by Scanza, R. A, Mahowald, N, Ghan, S, Zender, C. S, Kok, J. F, Liu, X, Zhang, Y, Albani, S

“…The mineralogy of desert dust is important due to its effect on radiation, clouds and biogeochemical cycling of trace nutrients. This study presents the…”
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Do dust emissions from sparsely vegetated regions dominate atmospheric iron supply to the Southern Ocean? by Ito, Akinori, Kok, Jasper F.

“…Atmospheric deposition of dust aerosols is a significant source of exogenous iron (Fe) in marine ecosystems and is critical in setting primary marine…”
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Climate Models and Remote Sensing Retrievals Neglect Substantial Desert Dust Asphericity by Huang, Yue, Kok, Jasper F., Kandler, Konrad, Lindqvist, Hannakaisa, Nousiainen, Timo, Sakai, Tetsu, Adebiyi, Adeyemi, Jokinen, Olli

“…Climate models and remote sensing retrievals generally assume that dust aerosols are spherical or spheroidal. However, measurements show that dust aerosols…”
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Single-scattering properties of ellipsoidal dust aerosols constrained by measured dust shape distributions by Huang, Yue, Kok, Jasper F, Saito, Masanori, Muñoz, Olga

“…Most global aerosol models approximate dust as spherical particles, whereas most remote sensing retrieval algorithms approximate dust as spheroidal particles…”
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The Intermittency of Wind‐Driven Sand Transport by Comola, F., Kok, J. F., Chamecki, M., Martin, R. L.

“…Wind‐blown sand is the main driver of dune development and dust emission from soils and is thus of fundamental importance for geomorphology, ecology, climate,…”
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An improved dust emission model – Part 1: Model description and comparison against measurements by Kok, J. F, Mahowald, N. M, Fratini, G, Gillies, J. A, Ishizuka, M, Leys, J. F, Mikami, M, Park, M.-S, Park, S.-U, Van Pelt, R. S, Zobeck, T. M

“…Simulations of the dust cycle and its interactions with the changing Earth system are hindered by the empirical nature of dust emission parameterizations in…”
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Fine dust emissions from active sands at coastal Oceano Dunes, California by Huang, Yue, Kok, Jasper F, Martin, Raleigh L, Swet, Nitzan, Katra, Itzhak, Gill, Thomas E, Reynolds, Richard L, Freire, Livia S

“…Sand dunes and other active sands generally have a low content of fine grains and, therefore, are not considered to be major dust sources in current climate…”
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Uncertainty in modeling dust mass balance and radiative forcing from size parameterization by Zhao, C, Chen, S, Leung, L. R, Qian, Y, Kok, J. F, Zaveri, R. A, Huang, J

“…This study examines the uncertainties in simulating mass balance and radiative forcing of mineral dust due to biases in the dust size parameterization…”
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