American Geophysical Union (AGU)

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A 780‐year annually resolved record of Indian Ocean monsoon precipitation from a speleothem from south Oman
American Geophysical Union (AGU) - Tập 107 Số D20 - 2002
Stephen Burns, Dominik Fleitmann, Manfred Mudelsee, Ulrich Neff, Albert Matter, Augusto Mangini
Meteorological records of monsoon rainfall in the Indian Ocean are generally less than 100 years long. The relative brevity of these records makes it difficult to investigate monsoon variation on decadal and centennial timescales, to determine what factors influence the intensity of rainfall on these timescales, or to place possible changes in the twentieth century into a broader historica...... hiện toàn bộ
West Florida continental shelf response to upwelling favorable wind forcing: 2. Dynamics
American Geophysical Union (AGU) - Tập 104 Số C10 - Trang 23427-23442 - 1999
Zhenjiang Li, Robert H. Weisberg
Dynamics analyses are presented for the west Florida continental shelf response to upwelling favorable, alongshore or offshore winds using a three‐dimensional, time‐dependent, primitive equation model. These analyses complement the kinematics analyses of Li and Weisberg [1999]. Results are provided on four topics: (1) the response evolutions to quasi steady state...... hiện toàn bộ
Influence of wind stress and discharge on the mean and seasonal currents on the Alabama shelf of the northeastern Gulf of Mexico
American Geophysical Union (AGU) - Tập 115 Số C12 - 2010
Brian Dzwonkowski, Kyeong Park
Analysis of a relatively long (3.33 years) time series of velocity in 20 m of water on the Alabama shelf of the northeastern Gulf of Mexico in conjunction with long‐term records of wind stress and discharge reveal a better understanding of the seasonal currents. Analysis of the mean and seasonal signals of the depth averaged velocity shows virtually no mean flow, but a relatively small yet...... hiện toàn bộ
West Florida shelf response to upwelling favorable wind forcing: Kinematics
American Geophysical Union (AGU) - Tập 104 Số C6 - Trang 13507-13527 - 1999
Zhenjiang Li, Robert H. Weisberg
The barotropic responses of the west Florida continental shelf to idealized upwelling favorable alongshore and offshore wind stresses are studied using the three‐dimensional, time‐dependent, primitive equation Princeton Ocean Model (POM). When forced with uniform winds, the shelf circulation evolves quickly to a quasi steady state. A southeastward alongshore wind lowers sea level along the...... hiện toàn bộ
West Florida shelf response to local wind forcing: April 1998
American Geophysical Union (AGU) - Tập 106 Số C12 - Trang 31239-31262 - 2001
Robert H. Weisberg, Zhenjiang Li, F. Karger
We compare west Florida shelf velocity and sea level data with a model simulation for April 1998. Responses for three upwelling and three downwelling favorable wind events are documented. Along‐shelf jets accompanied by oppositely directed upper and lower layer across‐shelf flows (with connecting vertical velocity) comprise the fully three‐dimensional inner shelf responses, which are sensi...... hiện toàn bộ
Wind‐driven inner‐shelf circulation off central Oregon during summer
American Geophysical Union (AGU) - Tập 110 Số C10 - 2005
Anthony Kirincich, John A. Barth, Brian A. Grantham, Bruce A. Menge, Jane Lubchenco
Velocity measurements from 17 deployments of moored acoustic Doppler current profilers obtained during four summer upwelling seasons are used to describe the cross‐shelf divergence of Ekman transport in the inner shelf off Oregon. For each deployment the measured surface and bottom cross‐shelf transports were compared with estimates of the theoretical Ekman transports to find the fraction ...... hiện toàn bộ
Partition coefficients of Hf, Zr, and ree between phenocrysts and groundmasses
American Geophysical Union (AGU) - Tập 89 Số S02 - 1984
Haruyuki Fujimaki, M. Tatsumoto, Kenichiro Aoki
Partition coefficients of Hf, Zr, and REE between olivine, orthopyroxene, clinopyroxene, plagioclase, garnet, amphibole, ilmenite, phlogopite, and liquid are presented. Samples consist of megacrysts in kimberlite, phenocrysts in alkaline basalts, tholeiitic basalts and andesitic to dacitic rocks, and synthetic garnet and clinopyroxene in Hawaiian tholeiites. The Hf‐Lu and Zr‐Lu elemental f...... hiện toàn bộ
Export pathways for river discharged fresh water in the northern Gulf of Mexico
American Geophysical Union (AGU) - Tập 108 Số C10 - 2003
Steven L. Morey, Paul J. Martin, James J. O’Brien, Alan A. Wallcraft, Jorge Zavala‐Hidalgo
A numerical simulation of the Gulf of Mexico (GoM) using the Navy Coastal Ocean Model (NCOM) is used to identify the pathways by which fresh water discharged by major rivers in the northern Gulf is exported away from the region. The NCOM, a new primitive equation ocean model with a hybrid sigma/geopotential level vertical coordinate, is described along with its application to the GoM regio...... hiện toàn bộ
Subtidal across-shelf velocity structure and surface transport effectiveness on the Alabama shelf of the northeastern Gulf of Mexico
American Geophysical Union (AGU) - Tập 116 Số C10
Brian Dzwonkowski, Kyeong Park, Lide Jiang
Patterns of ocean current variability on the West Florida Shelf using the self‐organizing map
American Geophysical Union (AGU) - Tập 110 Số C6 - 2005
Yonggang Liu, Robert H. Weisberg
Patterns of ocean current variability are examined on the West Florida Shelf by a neural network analysis based on the self‐organizing map (SOM), using time series of moored velocity data that span the interval October 1998–September 2001. Three characteristic spatial patterns are extracted in a 3 × 4 SOM array: spatially coherent southeastward and northwestward flow patterns with strong c...... hiện toàn bộ
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