This study demonstrates that Global Hawk unmanned aircraft system dropwindsondes and Atmospheric Infrared Sounder (AIRS) observations can be complementary in sampling a tropical cyclone (TC). The assimilation of both datasets in a regional ensemble data assimilation system shows that the cumulative impact of both datasets is greater than either one alone because of the presence of mutually independent information content. The experiment that assimilates both datasets has smaller position and intensity errors in the mean analysis than those with individual datasets. The improvements in track and intensity forecasts that result from combining both datasets also indicate synergistic benefits. Overall, superior track and intensity forecasts are evident. This study suggests that polar-orbiting satellite spatial coverage should be considered in operational reconnaissance mission planning in order to achieve further improvements in TC analyses and forecasts.
Lee, S. K.; Lopez, H.; Chung, E. S.; DiNezio, P.; Yeh, S. W.; Wittenberg, A. T.;
Published Date:
2018
Source:
Geophysical Research Letters, 45(2), 907-915.
Description:
The failed influence of the 2015-2016 El Nino on California rainfall has renewed interest in the relationship between El Nino and U.S. rainfall variability. Here we perform statistical data analyses and simple model experiments to show that sufficien...
Beron-Vera, F. J.; Olascoaga, M. J.; Wang, Y.; Trinanes, J.; Perez-Brunius, P.;
Published Date:
2018
Source:
Scientific Reports, 8, 11275.
Description:
Ocean flows are routinely inferred from low-resolution satellite altimetry measurements of sea surface height assuming a geostrophic balance. Recent nonlinear dynamical systems techniques have revealed that surface currents derived from altimetry can...
CIMAS (Cooperative Institute for Marine and Atmospheric Studies)
Description:
A one-dimensional (1D) analysis problem is defined and analyzed to explore the interaction of observation thinning or superobservation with observation errors that are correlated or systematic. The general formulation might be applied to a 1D analysi...
Annane, B.; McNoldy, B.; Leidner, S. M.; Hoffman, R.; Atlas, R.; Majumdar, S. J.;
Published Date:
2018
Source:
Monthly Weather Review, 146(7), 2221-2236.
Description:
In preparation for the launch of the NASA Cyclone Global Navigation Satellite System (CYGNSS), a variety of observing system simulation experiments (OSSEs) were conducted to develop, tune, and assess methods of assimilating these novel observations o...
Zou, Z. S.; Zhao, D. L.; Zhang, J. A.; Li, S. Q.; Cheng, Y. H.; Lv, H. B.; Ma, X.;
Published Date:
2018
Source:
Journal of Physical Oceanography, 48(4), 925-936.
Description:
The anomalous phenomena induced by the prevailing swell at low wind speeds prevent a complete understanding of air-sea interaction processes. Many studies have considered this complex problem, but most have focused on near-neutral conditions. In this...
Androulidakis, Y.; Kourafalou, V.; Ozgokmen, T.; Garcia-Pineda, O.; Lund, B.; Le Henaff, M.; Hu, C. M.; Haus, B. K.; Novelli, G.; Guigand, C.; Kang, H.; Hole, L.; Horstmann, J.;
Published Date:
2018
Source:
Journal of Geophysical Research-Oceans, 123(5), 3259-3285.
Description:
The Taylor Energy Site is located in the vicinity of the Mississippi Delta region over the Northern Gulf of Mexico (NGoM). Surface oil patches have been persistently observed within this site since 2004, when an oil rig was destroyed by Hurricane Iva...
Putman, N. F.; Goni, G. J.; Gramer, L. J.; Hu, C. M.; Johns, E. M.; Trinanes, J.; Wang, M. Q.;
Published Date:
2018
Source:
Progress in Oceanography, 165, 205-214.
Description:
Since 2011, beach inundation of massive amounts of pelagic Sargassum algae has occurred around the Caribbean nations and islands. Previous studies have applied satellite ocean color to determine the origins of this phenomenon. These techniques, combi...
Huang, L. Q.; Li, X. F.; Liu, B.; Zhang, J. A.; Shen, D. L.; Zhang, Z. H.; Yu, W. X.;
Published Date:
2018
Source:
Journal of Geophysical Research-Oceans, 123(4), 2981-2996.
Description:
Marine atmospheric boundary layer (MABL) roll plays an important role in the turbulent exchange of momentum, sensible heat, and moisture throughout MABL of tropical cyclone (TC). Hence, rolls are believed to be closely related to TC's development, in...
Meinen, C. S.; Speich, S.; Piola, A. R.; Ansorge, I.; Campos, E.; Kersale, M.; Terre, T.; Chidichimo, M. P.; Lamont, T.; Sato, O. T.; Perez, R. C.; Valla, D.; van den Berg, M.; Le Henaff, M.; Dong, S. F.; Garzoli, S. L.;
Published Date:
2018
Source:
Geophysical Research Letters, 45(9), 4180-4188.
Description:
Six years of simultaneous moored observations near the western and eastern boundaries of the South Atlantic are combined with satellite winds to produce a daily time series of the basin-wide meridional overturning circulation (MOC) volume transport a...
The impacts of Global Hawk (GH) dropwindsondes on tropical cyclone (TC) analyses and forecasts are examined over a composite sample of missions flown during the NASA Hurricane and Severe Storm Sentinel (HS3) and the NOAA Sensing Hazards with Operatio...
Leighton, H.; Gopalakrishnan, S.; Zhang, J. A.; Rogers, R. F.; Zhang, Z.; Tallapragada, V.;
Published Date:
2018
Source:
Journal of the Atmospheric Sciences, 75(1), 275-295.
Description:
Forecasts from the operational Hurricane Weather Research and Forecasting (HWRF)-based ensemble prediction system for Hurricane Edouard (2014) are analyzed to study the differences in both the tropical cyclone inner-core structure and large-scale env...
Bulletin of the American Meteorological Society, 101(7), E968–E987
Description:
The National Oceanic and Atmospheric Administration’s (NOAA) Sensing Hazards with Operational Unmanned Technology (SHOUT) project evaluated the ability of observations from high-altitude unmanned aircraft to improve forecasts of high-impact weather...
AbstractThe impact of Global Hawk (GH) dropwindsondes on tropical cyclone analyses and forecasts is evaluated in an ensemble-based vortex-scale data assimilation system. Two cases from Hurricane Edouard (2014) are presented. In the first case, inner-...
The impacts of Global Hawk (GH) dropwindsondes on tropical cyclone (TC) analyses and forecasts are examined over a composite sample of missions flown during the NASA Hurricane and Severe Storm Sentinel (HS3) and the NOAA Sensing Hazards with Operatio...
Few studies have examined the forecast uncertainties brought about from varying aircraft flight track patterns in targeted observations for extratropical winter storms. To examine the degree of uncertainty in downstream forecasts caused by different ...
Wick, Gary A.; Dunion, Jason P.; Walker, John, 1972-; Black, Peter G.;
Corporate Authors:
NOAA Unmanned Aircraft Systems Program (U.S.)
Published Date:
2018
Series:
NOAA Technical Memorandum OAR UAS ; 001
Description:
"The primary scientific goal of the Sensing Hazards with Operational Unmanned Technology (SHOUT) Project is to determine the potential utility of observations from high-altitude, long- endurance unmanned aircraft systems (UAS) such as the Global Hawk...
File Type:
[PDF - 8.81 MB]
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