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Clément Guilloteau, Antonios Mamalakis, Lawrence Vulis, Phong V. V. Le, Tryphon T. Georgiou, and Efi Foufoula-Georgiou

identified by the rsPCA in the 500-mb GPH at that same frequency of 15 days. Therefore, this mode is interpreted as the signature of an atmospheric Rossby wave on the SST and reveals ocean–atmosphere coupling. This shows the ability of the spectral PCA to extract coherent modes of low amplitude from random variability and noise. Fig . 17. First unrotated eigenvector (magnitude and phase) at the 15-day period of the sPCA applied to daily SST anomalies. The eastward propagating signal is interpreted as the

Open access
Clement Guilloteau, Efi Foufoula-Georgiou, Pierre Kirstetter, Jackson Tan, and George J. Huffman

. 3 , right column). Two-dimensional space–time PSDs are commonly used in climate and Earth science to analyze the propagation of atmospheric and oceanic waves along longitudes ( Wheeler and Kiladis 1999 ; Lin et al. 2006 ; Orbe et al. 2020 ). The left half of the PSD (negative wavelengths) corresponds to eastward propagating waves and the right half (positive wavelengths) corresponds to westward propagating waves. The two-dimensional space–time PSD shows the energy of the eastward and westward

Open access
F. Joseph Turk, Sarah E. Ringerud, Yalei You, Andrea Camplani, Daniele Casella, Giulia Panegrossi, Paolo Sanò, Ardeshir Ebtehaj, Clement Guilloteau, Nobuyuki Utsumi, Catherine Prigent, and Christa Peters-Lidard

-Georgiou , C. D. Kummerow , and V. Petković , 2018 : Resolving surface rain from GMI high-frequency channels: Limits imposed by the three-dimensional structure of precipitation . J. Atmos. Oceanic Technol. , 35 , 1835 – 1847 , https://doi.org/10.1175/JTECH-D-18-0011.1 . 10.1175/JTECH-D-18-0011.1 Haddad , Z. S. , R. C. Sawaya , S. Kacimi , O. O. Sy , F. J. Turk , and J. Steward , 2017 : Interpreting millimeter-wave radiances over tropical convective clouds . J. Geophys. Res

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Abby Stevens, Rebecca Willett, Antonios Mamalakis, Efi Foufoula-Georgiou, Alejandro Tejedor, James T. Randerson, Padhraic Smyth, and Stephen Wright

importance of Atlantic Ocean temperatures as drivers of SWUS precipitation as well ( Enfield et al. 2001 ; McCabe et al. 2004 ), our focus here is only on the Pacific Ocean, as a first step. We cast the prediction problem as an estimation problem in which predictors are not specified in advance, but rather emerge from the data by minimizing an appropriate loss function. We first demonstrate the increased predictive skill of the proposed GTV model when the covariance matrix that defines the GTV

Open access
Nobuyuki Utsumi, F. Joseph Turk, Ziad S. Haddad, Pierre-Emmanuel Kirstetter, and Hyungjun Kim

index, it is in the EPC database for analysis purposes, as a means to efficiently separate the results of this study by fixed surface types. The surface type information obtained from GPROF product provides 14 surface type classes (i.e., ocean, sea ice, five types of vegetation, four types of snow cover, standing water, land/ocean or water coast, and sea ice edge) based on self-similar emissivities derived from TELSEM ( Aires et al. 2011 ; Passive Microwave Algorithm Team Facility 2018 ). In the

Open access
Andrea Camplani, Daniele Casella, Paolo Sanò, and Giulia Panegrossi

://pmm.nasa.gov/sites/default/files/document_files/CSATGPM_COIN_ATBD.pdf . Walker , A. E. , and B. E. Goodison , 1993 : Discrimination of a wet snow cover using passive microwave satellite data . Ann. Glaciol. , 17 , 307 – 311 , https://doi.org/10.3189/S026030550001301X . 10.3189/S026030550001301X Wang , D. , and Coauthors , 2017 : Surface emissivity at microwaves to millimeter waves over polar regions: Parameterization and evaluation with aircraft experiments . J. Atmos. Oceanic Technol. , 34 , 1039 – 1059 , https://doi.org/10.1175/JTECH-D-16-0188.1 . 10

Open access
Alberto Ortolani, Francesca Caparrini, Samantha Melani, Luca Baldini, and Filippo Giannetti

based on the attenuation caused by rainfall on microwave (MW) links used for satellite TV broadcasting or cellular networks backhauling are encountering increasing attention. Both of them share the common principle that electromagnetic wave is attenuated by the presence of raindrops. Attenuation depends on frequency that for telecommunication systems is typically in the range 10–40 GHz. While the attenuation mechanism is basically the same, the link geometries have different characteristics

Open access