Search Results - "Knaff, John A."

Physical understanding of the tropical cyclone wind-pressure relationship by Chavas, Daniel R., Reed, Kevin A., Knaff, John A.

“…The relationship between the two common measures of tropical cyclone intensity, the central pressure deficit and the peak near-surface wind speed, is a…”
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An Objective Satellite-Based Tropical Cyclone Size Climatology by Knaff, John A., Longmore, Scott P., Molenar, Debra A.

“…Storm-centered infrared (IR) imagery of tropical cyclones (TCs) is related to the 850-hPa mean tangential wind at a radius of 500 km (V500) calculated from…”
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Implications of the Observed Relationship between Tropical Cyclone Size and Intensity over the Western North Pacific by Wu, Liguang, Tian, Wei, Liu, Qingyuan, Cao, Jian, Knaff, John A.

“…Tropical cyclone (TC) size, usually measured with the radius of gale force wind (34 kt or 17 m s−1), is an important parameter for estimating TC risks such as…”
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IS TROPICAL CYCLONE INTENSITY GUIDANCE IMPROVING? by DeMaria, Mark, Sampson, Charles R., Knaff, John A., Musgrave, Kate D.

“…The mean absolute error of the official tropical cyclone (TC) intensity forecasts from the National Hurricane Center (NHC) and the Joint Typhoon Warning Center…”
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Evolution of the upper‐level thermal structure in tropical cyclones by Rivoire, Louis, Birner, Thomas, Knaff, John A.

“…Tropical cyclones (TCs) are associated with tropopause‐level cooling above tropospheric warming. We collect temperature retrievals from 2007 to 2014 near…”
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An Automated, Objective, Multiple-Satellite-Platform Tropical Cyclone Surface Wind Analysis by Knaff, John A., DeMaria, Mark, Molenar, Debra A., Sampson, Charles R., Seybold, Matthew G.

“…A method to estimate objectively the surface wind fields associated with tropical cyclones using only data from multiple satellite platforms and…”
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Improved Tropical-Cyclone Flight-Level Wind Estimates Using Routine Infrared Satellite Reconnaissance by Knaff, John A., Longmore, Scott P., DeMaria, Robert T., Molenar, Debra A.

“…A new and improved method for estimating tropical-cyclone (TC) flight-level winds using globally and routinely available TC information and infrared (IR)…”
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Improvement of Advanced Microwave Sounding Unit Tropical Cyclone Intensity and Size Estimation Algorithms by Demuth, Julie L., DeMaria, Mark, Knaff, John A.

“…Previous work, in which Advanced Microwave Sounding Unit (AMSU) data from the Atlantic Ocean and east Pacific Ocean basins during 1999–2001 were used to…”
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Cyclone-cyclone interactions through the ocean pathway by Balaguru, Karthik, Taraphdar, Sourav, Leung, L. Ruby, Foltz, Gregory R., Knaff, John A.

“…The intense sea surface temperature cooling caused by tropical cyclone‐induced mixing lasts several weeks and may thus influence a later cyclone passing over…”
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Ocean heat content for tropical cyclone intensity forecasting and its impact on storm surge by Lin, I.-I., Goni, Gustavo J., Knaff, John A., Forbes, Cristina, Ali, M. M.

“…Accurate tropical cyclone track and intensity forecasts are vital to storm surge prediction and risk management. However, current cyclone intensity forecast…”
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Upper Oceanic Energy Response to Tropical Cyclone Passage by Knaff, John A., Demaria, Mark, Sampson, Charles R., Peak, James E., Cummings, James, Schubert, Wayne H.

“…The upper oceanic temporal response to tropical cyclone (TC) passage is investigated using a 6-yr daily record of data-driven analyses of two measures of upper…”
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Ocean Observations in Support of Studies and Forecasts of Tropical and Extratropical Cyclones by Domingues, Ricardo, Kuwano-Yoshida, Akira, Chardon-Maldonado, Patricia, Todd, Robert E., Halliwell, George, Kim, Hyun-Sook, Lin, I.-I., Sato, Katsufumi, Narazaki, Tomoko, Shay, Lynn K., Miles, Travis, Glenn, Scott, Zhang, Jun A., Jayne, Steven R., Centurioni, Luca, Le Hénaff, Matthieu, Foltz, Gregory R., Bringas, Francis, Ali, M. M., DiMarco, Steven F., Hosoda, Shigeki, Fukuoka, Takuya, LaCour, Benjamin, Mehra, Avichal, Sanabia, Elizabeth R., Gyakum, John R., Dong, Jili, Knaff, John A., Goni, Gustavo

“…Over the past decade, measurements from the climate-oriented ocean observing system have been key to advancing the understanding of extreme weather events that…”
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On the Decay of Tropical Cyclone Winds Crossing Narrow Landmasses by DeMaria, Mark, Knaff, John A., Kaplan, John

“…A method is developed to adjust the Kaplan and DeMaria tropical cyclone inland wind decay model for storms that move over narrow landmasses. The basic…”
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Revisiting the maximum intensity of recurving tropical cyclones by Knaff, John A.

“…Previous studies have indicated that recurving western North Pacific tropical cyclones, initially westward moving tropical cyclones that turn toward the east,…”
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Quantifying the Radiative Impact of Clouds on Tropopause Layer Cooling in Tropical Cyclones by Rivoire, Louis, Birner, Thomas, Knaff, John A., Tourville, Natalie

“…A ubiquitous cold signal near the tropopause, here called “tropopause layer cooling” (TLC), has been documented in deep convective regions such as tropical…”
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Tropical Cyclone Wind Retrievals from the Advanced Microwave Sounding Unit: Application to Surface Wind Analysis by Bessho, Kotaro, DeMaria, Mark, Knaff, John A.

“…Horizontal winds at 850 hPa from tropical cyclones retrieved using the nonlinear balance equation, where the mass field was determined from Advanced Microwave…”
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Can We Detect Trends in Extreme Tropical Cyclones? by Landsea, Christopher W., Harper, Bruce A., Hoarau, Karl, Knaff, John A.

“…Recent studies have found a large, sudden increase in observed tropical cyclone intensities, linked to warming sea surface temperatures that may be associated…”
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Estimating tropical cyclone surface winds: Current status, emerging technologies, historical evolution, and a look to the future by John A. Knaff, Charles R. Sampson, Matthew E. Kucas, Christopher J. Slocum, Michael J. Brennan, Thomas Meissner, Lucrezia Ricciardulli, Alexis Mouche, Nicolas Reul, Mary Morris, Galina Chirokova, Philippe Caroff

“…This article provides a review of tropical cyclone (TC) surface wind estimation from an operational forecasting perspective. First, we provide a summary of…”
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The GSI capability to assimilate TRMM and GPM hydrometeor retrievals in HWRF by Wu, Ting‐Chi, Zupanski, Milija, Grasso, Lewis D., Brown, Paula J., Kummerow, Christian D., Knaff, John A.

“…Hurricane forecasting skills may be improved by utilizing increased precipitation observations available from the Global Precipitation Measurement mission…”
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A review of recent advances (2018–2021) on tropical cyclone intensity change from operational perspectives, part 1: Dynamical model guidance by Zhan Zhang, Weiguo Wang, James D. Doyle, Jonathan Moskaitis, William A. Komaromi, Julian Heming, Linus Magnusson, John P. Cangialosi, Levi Cowan, Michael Brennan, Suhong Ma, Ananda Kumar Das, Hosomi Takuya, Peter Clegg, Thomas Birchard, John A. Knaff, John Kaplan, Mrutyunjay Mohapatra, Monica Sharma, Ikegami Masaaki, Liguang Wu, Eric Blake

“…This review summarizes the rapporteur report on tropical cyclone (TC) intensity change from the operational perspective, as presented to the 10th International…”
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