Search Results - "Knaff, J. A."

Evaluation of long-term trends in tropical cyclone intensity forecasts by DeMaria, M., Knaff, J. A., Sampson, C.

“…The National Hurricane Center and Joint Typhoon Warning Center operational tropical cyclone intensity forecasts for the three major northern hemisphere…”
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Development of a hybrid variational-ensemble data assimilation technique for observed lightning tested in a mesoscale model by Apodaca, K, Zupanski, M, DeMaria, M, Knaff, J A, Grasso, L D

“…Lightning measurements from the Geostationary Lightning Mapper (GLM) that will be aboard the Geostationary Operational Environmental Satellite – R Series will…”
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Changes in Global Monsoon Circulations Since 1950 by Chase, T N, Knaff, J A, Pielke, R A, Kalnay, E

“…We examined changes in several independent intensity indices of four majortropical monsoonal circulations for the period 1950-1998. Theseintensity indices…”
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Global assessment of tropical cyclone intensity statistical–dynamical hindcasts by Neetu, S., Lengaigne, M., Menon, H. B., Vialard, J., Mangeas, M., Menkes, C. E., Ali, M. M., Suresh, I., Knaff, J. A.

“…This paper assesses the characteristics of linear statistical models developed for tropical cyclone (TC) intensity prediction at global scale. To that end,…”
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Analysis of 200 mbar zonal wind for the period 1958-1997 by Pielke, R. A., Chase, T. N., Kittel, T. G. F., Knaff, J. A., Eastman, J.

“…The value of the analyses of the 200 mbar zonal winds is proposed as a particularly effective tool to assess variability and trends in atmospheric circulation…”
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Implications of Summertime Sea Level Pressure Anomalies in the Tropical Atlantic Region by Knaff, John A.

“…This study explores the inverse relationship between sea level pressure and tropical cyclones in the tropical Atlantic (TA). Upper-air observations, the…”
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How Much Skill Was There in Forecasting the Very Strong 1997–98 El Niño? by Landsea, Christopher W., Knaff, John A.

“…The very strong 1997–98 El Niño was the first major event in which numerous forecasting groups participated in its real-time prediction. A previously developed…”
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A comparison of regional trends in 1979–1997 depth‐averaged tropospheric temperatures by Chase, Thomas N., Pielke Sr, Roger A., Knaff, John A., Kittel, Timothy G.F., Eastman, Joseph L.

“…This study examines regional temperature trends during the period 1979–1997 from the Microwave Sounding Unit (MSU) 2r satellite measurements and compares them…”
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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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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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Evaluation of long-term trends in tropical cyclone intensity forecasts: Special issue on tropical cyclones by DEMARIA, M, KNAFF, J. A, SAMPSON, C

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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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Evaluation of Advanced Microwave Sounding Unit Tropical-Cyclone Intensity and Size Estimation Algorithms by Demuth, J L, DeMaria, M, Knaff, JA, Vonder Haar, TH

“…Advanced Microwave Sounding Unit (AMSU) data are used to provide objective estimates of 1-min maximum sustained surface winds, minimum sea level pressure, and…”
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Atlantic basin hurricanes: Indices of climatic changes by Landsea, Christopher W, Pielke, Roger A, Mestas-Nunez, Alberto M, Knaff, John A

“…Accurate records of basinwide Atlantic and U.S. landfalling hurricanes extend back to the mid 1940s and the turn of the century, respectively, as a result of…”
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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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Analysis of 200 mbar zonal wind for the period 1958-1997 by Pielke Sr, R A, Chase, T N, Kittel, T G F, Knaff, J A, Eastman, J

“…The value of the analyses of the 200-mbar zonal winds is proposed as a particularly effective tool to assess variability and trends in atmospheric circulation…”
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Changes in global monsoon circulations since 1950: Global warming and extreme weather: an assessment by CHASE, T. N, KNAFF, J. A, PIELKE, R. A, KALNAY, E

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Atlantic basin hurricanes : Indices of climatic changes: Weather and Climate Extremes: Changes, Variations and a Perspective from the Insurance Industry by LANDSEA, C. W, PIELKE, R. A, MESTAS-NUNEZ, A. M, KNAFF, J. A

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Changes in Global Monsoon Circulation Since 1950 by Chase, T N, Knaff, JA, Pielke, R A, Kalnay, E

“…Changes in intensity indices of four major tropical monsoon patterns between 1950-98 were compared, including observed land surface precipitation, observed…”
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Evaluation of Advanced Microwave Sounding Unit Tropical-Cyclone Intensity and Size Estimation Algorithms by Demuth, Julie L., DeMaria, Mark, Knaff, John A., Haar, Thomas H. Vonder

“…Advanced Microwave Sounding Unit (AMSU) data are used to provide objective estimates of 1-min maximum sustained surface winds, minimum sea level pressure, and…”
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