A Comparison Between the Generalized Digital Environmental Model and Levitus climatologies

Teague, William J.; Carron, Michael J.; Hogan, Patrick

doi:10.1029/jc095ic05p07167

Cited by 306 publications

(194 citation statements)

References 9 publications

Supporting

Mentioning

184

Contrasting

Unclassified

Order By: Relevance

“…Bathymetry was from multibeam depth soundings where available, and from the 30 arc-second database 32 elsewhere. Stratification was horizontally uniform in the far-field and near-field models, obtained from the generalized digital environmental model database (GDEM) climatology for the month 17 of August 33 for the far-field model and from August 2010 field data for the near-field model. Stratification in the Kuroshio models was from larger-scale data-assimilating regional simulations.…”

Section: Numerical Modelsmentioning

confidence: 99%

The formation and fate of internal waves in the South China Sea

Alford

Peacock

MacKinnon

et al. 2015

Nature

541

329

View full text Add to dashboard Cite

Internal gravity waves, the subsurface analogue of the familiar surface gravity waves that break on beaches, are ubiquitous in the ocean. Because of their strong Internal gravity waves are propagating disturbances of the ocean's density stratification. Their physics resembles that of surface gravity waves but with buoyancy rather than gravity providing their restoring force -making them much larger (10's to 100's of meters instead of 1 to 10 meters) and slower (hours instead of seconds). Generated primarily by tidal flow past seafloor topography and winds blowing on the sea surface, and typically having multi-kilometer-scale horizontal wavelengths, their estimated 1 TW of deep-sea dissipation is understood to play a crucial role in the ocean's global redistribution of heat and momentum 12 . A major challenge is to improve understanding of internal wave generation, propagation, steepening and dissipation, so that the role of internal waves can be more accurately incorporated in climate models.The internal waves that originate from the Luzon Strait on the eastern margin of the South China Sea (SCS) are the largest documented in the global oceans ( Figure 1).As the waves propagate west from the Luzon Strait they steepen dramatically ( Figure 1a), producing distinctive solitary wave fronts evident in sun glint and synthetic aperture radar (SAR) images from satellites ( Figure 1b). When they shoal onto the continental slope to the west, the downward displacement of the ocean's layers associated with these solitary waves can exceed 250 m in 5 minutes 8 . On such a scale, these waves pose hazards for underwater navigation and offshore drilling 4 , and supply nutrients from the deep ocean that nourish coral reefs 1 and pilot whale populations that forage in their wakes 13 .Over the past decade a number of field studies have been conducted in the region; this work has been comprehensively reviewed 10,11 . All of these studies, however, focused on the propagation of the internal waves across the SCS and their interactions with the continental shelf of China. Until the present study there had been no substantial in situ data gathered at the generation site of the Luzon Strait, in large part because of the extremely challenging operating conditions. A consequence has been persistent 5 confusion regarding the nature of the generation mechanism 11 ; an underlying cause being the sensitivity of the models employed to the system parameters, such as the chosen transect for a two-dimensional model, the linear internal wave speed or the assumed location of the waves' origin within the Luzon Strait. Furthermore, the lack of in situ data from the Luzon Strait has meant an inability to test numerical predictions of energy budgets 9 and no knowledge of the impact of the Kuroshio on the emergence of internal solitary waves 11 .The goal of IWISE is to obtain the first comprehensive in situ data set from the Luzon Strait, which in combination with high-resolution three-dimensional numerical modeling supports a cradle-to-grave picture ...

show abstract

Section: Numerical Modelsmentioning

confidence: 99%

The formation and fate of internal waves in the South China Sea

Alford

Peacock

MacKinnon

et al. 2015

Nature

541

329

View full text Add to dashboard Cite

show abstract

“…The CLS SSH anomaly dataset has a 7-day temporal resolution and a 1/3°ϫ 1/3°spatial resolution. Using the climatological surface dynamic height data of Teague et al (1990) as the mean SSH, the absolute SSH field (which will be referred to as the SSH field for brevity) is simply the sum of the mean and anomalous SSH data.…”

Section: Kess'04 Surveysmentioning

confidence: 99%

Observations of the Subtropical Mode Water Evolution from the Kuroshio Extension System Study

Qiu

Hacker

Chen

et al. 2006

Journal of Physical Oceanography

View full text Add to dashboard Cite

Properties and seasonal evolution of North Pacific Ocean subtropical mode water (STMW) within and south of the Kuroshio Extension recirculation gyre are analyzed from profiling float data and additional hydrographic and shipboard ADCP measurements taken during 2004. The presence of an enhanced recirculation gyre and relatively low mesoscale eddy variability rendered this year favorable for the formation of STMW. Within the recirculation gyre, STMW formed from late-winter convection that reached depths greater than 450 m near the center of the gyre. The lower boundary of STMW, corresponding to Ӎ 25.5 kg m Ϫ3 , was set by the maximum depth of the late-winter mixed layer. Properties within the deep portions of the STMW layer remained largely unchanged as the season progressed. In contrast, the upper boundary of the STMW layer eroded steadily as the seasonal thermocline deepened from late April to August. Vertical eddy diffusivity responsible for this erosion was estimated from a budget analysis of potential vorticity to be in the range of ϳ2-5 ϫ 10 Ϫ4 m 2 s Ϫ1 . The latitudinal extent of the STMW formation was narrow, extending from 30°N to the Kuroshio Extension jet near 35°N. South of 30°N, STMW did not form locally but was transported from the recirculation gyre by lateral induction.

show abstract

“…(4) denotes the Doppler-shift by the mean current U (positive eastward); the effect varies with wavelength of anomalies and vanishes in the long wave limit. Attempts are made to explain discrepancies of phase speed between observed anomalies and theoretical long Rossby waves quantitatively, using the climatological mean of surface geostrophic current U relative to the 1000 dbar (Teague et al, 1990). The zonal wavenumber k is estimated from the wavelength which was derived by the lag correlation diagram of SSDT anomalies in the previous section (Fig.…”

Section: Discussionmentioning

confidence: 99%