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Author Stukel, M.R. ; Kelly, T.B.
Title The carbon: 234Thorium ratios of sinking particles in the California current ecosystem 2: Examination of a thorium sorption, desorption, and particle transport model Type $loc['typeJournal Article']
Year Publication Marine Chemistry Abbreviated Journal Marine Chemistry
Volume Issue Pages
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ISSN 0304-4203
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Funding Approved $loc['no']
Call Number COAPS @ user @
Serial 1037
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Author Deng, J. ; Wu, Z. ; Zhang, M. ; Huang, N.E. ; Wang, S. ; Qiao, F.
Title Using Holo-Hilbert spectral analysis to quantify the modulation of Dansgaard-Oeschger events by obliquity Type $loc['typeJournal Article']
Year 2018 Publication Quaternary Science Reviews Abbreviated Journal Quaternary Science Reviews
Volume 192
Issue Pages 282-299
Keywords Pleistocene ; Paleoclimatology ; Greenland ; Antarctica ; Data treatment ; Data analysis ; Dansgaard-oeschger (DO) events ; Obliquity forcing ; Phase preference ; Holo-hilbert spectral analysis ; Amplitude modulation ; EMPIRICAL MODE DECOMPOSITION ; GREENLAND ICE-CORE ; NONSTATIONARY TIME-SERIES ; ABRUPT CLIMATE-CHANGE ; LAST GLACIAL PERIOD ; NORTH-ATLANTIC ; MILLENNIAL-SCALE ; RECORDS ; VARIABILITY ; CYCLE
Abstract Astronomical forcing (obliquity and precession) has been thought to modulate Dansgaard-Oeschger (DO) events, yet the detailed quantification of such modulations has not been examined. In this study, we apply the novel Holo-Hilbert Spectral Analysis (HHSA) to five polar ice core records, quantifying astronomical forcing's time-varying amplitude modulation of DO events and identifying the preferred obliquity phases for large amplitude modulations. The unique advantages of HHSA over the widely used windowed Fourier spectral analysis for quantifying astronomical forcing's nonlinear modulations of DO events is first demonstrated with a synthetic data that closely resembles DO events recorded in Greenland ice cores (NGRIP, GRIP, and GISP2 cores on GICC05 modelext timescale). The analysis of paleoclimatic proxies show that statistically significantly more frequent DO events, with larger amplitude modulation in the Greenland region, tend to occur in the decreasing phase of obliquity, especially from its mean value to its minimum value. In the eastern Antarctic, although statistically significantly more DO events tend to occur in the decreasing obliquity phase in general, the preferred phase of obliquity for large amplitude modulation on DO events is a segment of the increasing phase near the maximum obliquity, implying that the physical mechanisms of DO events may be different for the two polar regions. Additionally, by using cross-spectrum and magnitude-squared analyses, Greenland DO mode at a timescale of about 1400 years leads the Antarctic DO mode at the same timescale by about 1000 years. (C) 2018 Elsevier Ltd. All rights reserved.
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ISSN 0277-3791
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Call Number COAPS @ user @
Serial 971
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Author Bellow, J. G. ; Nair, P. K. R. ; Martin, T. A.
Title Tree-Crop Interactions in Fruit Tree-based Agroforestry Systems in the Western Highlands of Guatemala: Component Yields and System Performance Type $loc['typeBook Chapter']
Year 2008 Publication Toward Agroforestry Design. Advances in Agroforestry Abbreviated Journal
Volume 4
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Publisher Springer
Place of Publication Dordrecht
Editor Jose, S.; Gordon, A. M.
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Call Number COAPS @ mfield @
Serial 906
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Author Bellow, J., A. Mokssit, J. O'Brien, and R. Sebbari
Title Building national and specialised climate services Type $loc['typeBook Chapter']
Year 2008 Publication Seasonal Climate: Forecasting and Managing Risk Abbreviated Journal
Volume Issue Pages 315-349
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Publisher Springer
Place of Publication Editor Troccoli, A.; Harrison, M.; Anderson, D. L. T.; Mason, S.
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Call Number COAPS @ mfield @
Serial 682
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Author Bhardwaj, A. ; Misra, V. ; Mishra, A. ; Wootten, A. ; Boyles, R. ; Bowden, J. H. ; Terando, A. J.
Title Downscaling future climate change projections over Puerto Rico using a non-hydrostatic atmospheric model Type $loc['typeJournal Article']
Year 2018 Publication Climatic Change Abbreviated Journal
Volume 147
Issue 1-2
Pages 133-147
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Call Number COAPS @ mfield @
Serial 550
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Author Laurencin, C. N. ; Misra, V.
Title Characterizing the Variations of the motion of the North Atlantic tropical cyclones Type $loc['typeJournal Article']
Year 2017 Publication Meteorology and Atmospheric Physics Abbreviated Journal
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Call Number COAPS @ mfield @
Serial 555
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Author Glazer, R. H. ; Misra, V.
Title Ice versus liquid water saturation in simulations of the Indian summer monsoon Type $loc['typeJournal Article']
Year 2018 Publication Climate Dynamics Abbreviated Journal
Volume Issue Pages
Keywords Indian monsoon ; Regional modeling ; Saturation vapor pressure ; Cloud microphysics scheme
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Call Number COAPS @ mfield @
Serial 943
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Author Misra, V ; Bhardwaj, A ; Mishra, A
Title Characterizing the rainy season of Peninsular Florida Type $loc['typeJournal Article']
Year 2018 Publication Climate Dynamics Abbreviated Journal
Volume 51
Issue 5-6
Pages 2157-2167
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Abstract Peninsular Florida (PF) has a very distinct wet season that can be objectively defined with onset and demise dates based on daily rainfall. The dramatic onset of rains and its retreat coincides with the seasonal cycle of the regional scale atmospheric and upper ocean circulations and upper ocean heat content of the immediate surrounding ocean. The gradual warming of the Intra-Americas Seas (IAS; includes Gulf of Mexico, Caribbean Sea and parts of northwestern subtropical Atlantic Ocean) with the seasonal evolution of the Loop Current and increased atmospheric heat flux in to the ocean eventually enhance the moisture flux into terrestrial PF around the time of the onset of the Rainy Season of PF (RSPF). Similarly, the RSPF retreats with the cooling of the IAS that coincides with the weakening of the Loop Current and reduction of the upper ocean heat content of the IAS. It is also shown that anomalous onset and demise dates of the RSPF have implications on its seasonal rainfall anomalies.
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Call Number COAPS @ mfield @
Serial 556
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Author Misra, V. ; Bhardwaj, A. ; Mishra, A.
Title Local onset and demise of the Indian summer monsoon Type $loc['typeJournal Article']
Year 2018 Publication Climate Dynamics Abbreviated Journal
Volume 51
Issue 5-6
Pages 1609-1622
Keywords Indian monsoon ; ENSO ; Onset of monsoon
Abstract This paper introduces an objective definition of local onset and demise of the Indian summer monsoon (ISM) at the native grid of the Indian Meteorological Department's rainfall analysis based on more than 100 years of rain gauge observations. The variability of the local onset/demise of the ISM is shown to be closely associated with the All India averaged rainfall onset/demise. This association is consistent with the corresponding evolution of the slow large-scale reversals of upper air and ocean variables that raise the hope of predictability of local onset and demise of the ISM. The local onset/demise of the ISM also show robust internannual variations associated with El Nino and the Southern Oscillation and Indian Ocean dipole mode. It is also shown that the early monsoon rains over northeast India has a predictive potential for the following seasonal anomalies of rainfall and seasonal length of the monsoon over rest of India.
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Call Number COAPS @ mfield @
Serial 360
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Author Laurencin, C. ; Misra, V.
Title Characterizing the Variations of the motion of the North Atlantic tropical cyclones Type $loc['typeJournal Article']
Year 2018 Publication Meteorology and Atmospheric Physics Abbreviated Journal Meteorol Atmos Phys
Volume 130
Issue 303
Pages 1-12
Keywords climatology ; interannual scales ; environment
Abstract In this study, we examine the seasonal and interannual variability of the North Atlantic (NATL) tropical cyclone (TC) motion from the historical Hurricane Database (HURDAT2) over the period 1988-2014. We characterize these motions based on their position, lifecycle, and seasonal cycle. The main findings of this study include: (1) of the 11,469 NATL TC fixes examined between 1988 and 2014, 81% of them had a translation speed of < 20 mph; (2) TCs in the deep tropics of the NATL are invariably slow-moving in comparison with TCs in higher latitudes. Although fast-moving TCs (> 40 mph) are exclusively found north of 30 N, the slow-moving TCs have a wide range of latitude. This is largely a consequence of the background steering flow being weaker (stronger) in the tropical (higher) latitudes with a minimum around the subtropical latitudes of NATL; (3) there is an overall decrease in the frequency of all categories of translation speed of TCs in warm relative to cold El Niño Southern Oscillation (ENSO) years. However, in terms of the percentage change, TCs with a translation speed in the range of 10-20 mph display the most change (42%) in warm relative to cold ENSO years; and (4) there is an overall decrease in frequency across all categories of TC translation speed in small relative to large Atlantic Warm Pool years, but in terms of percentage change in the frequency of TCs, there is a significant and comparable change in the frequency over a wider range of translation speeds than the ENSO composites. This last finding suggests that Atlantic Warm Pool variations have a more profound impact on the translation speed of Atlantic TCs than ENSO.
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Call Number COAPS @ rl18 @
Serial 991
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