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2 edition of effect of stochastic surface heat fluxes on the climatology of the seasonal thermocline found in the catalog.

effect of stochastic surface heat fluxes on the climatology of the seasonal thermocline

David C. Copley

effect of stochastic surface heat fluxes on the climatology of the seasonal thermocline

  • 231 Want to read
  • 17 Currently reading

Published .
Written in English

    Subjects:
  • Thermoclines (Oceanography)

  • Edition Notes

    Statementby David C. Copley.
    The Physical Object
    Pagination50 p. :
    Number of Pages50
    ID Numbers
    Open LibraryOL14277428M

    Several well-known features are evident. Among these are very high outgoing fluxes of latent and sensible heat during the late fall and early winter, which drive strong cooling of the lakes, and greater seasonal variation of surface temperature and fluxes in shallower by: 4. However, the effect of stochastic atmospheric induced heat and moisture fluxes in the origin of the equatorial Atlantic Niño remains largely unknown and is thus examined in the present study. The monthly Atlantic Niño index of the 12 slab-CGCMs exhibits strong variability (σ=∼± K; for the full-CGCMs, σ=∼± K).Cited by:   where OHC [J] is the ocean heat content, t is time and t 0 is an initial reference time. F′ is the air-sea heat flux across the sea surface, S′ and N′ are ocean MHTs through the southern (°N) and northern (41°N) boundaries, respectively [J s −1 = W], and primes denote anomalies relative to a seasonal climatology. To estimate the seasonal cycle in S′, we use the first 5 years of Cited by:


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effect of stochastic surface heat fluxes on the climatology of the seasonal thermocline by David C. Copley Download PDF EPUB FB2

Calhoun: The NPS Institutional Archive Theses and Dissertations Thesis Collection The effect of stochastic surface heat fluxes on the climatology of the seasonal thermocline.

The object of this paper is to show the effect of stochastic surface heat flux forcing on the climatology of a model seasonal thermocline. It was theoretically demon-strated by Hasselmann () that if "weather" forcing can be considered to be white noise, then the ocean acts as an integrator.

The result is a red-shifted response spectrum. The effect of stochastic surface heat fluxes on the climatology of the seasonal thermocline. Item Preview remove-circle The effect of stochastic surface heat fluxes on the climatology of the seasonal thermocline.

by Copley, David C. some content may be lost due to the binding of the book. Addeddate Call number Pages: The presence of the stochastic heat flux component causes the average sea surface temperature to be C higher than it would be with only the annual period component.

it also delays the time of maximum surface temperature, and it causes the average mixed layer Author: David C. Copley. A stochastic wind stress component applied to an annual heat flux cycle produces a smaller sea surface temperature variance, but results in a more rapidly deepening and deeper mixed layer than achieved with an annual cycle and constant wind stress.

The stochastic forcing model shows that the climatology of the seasonal thermocline is dependent on nonlinear interactions between the annual cycle and stochastic. The Effect of Stochastic Surface Heat Fluxes On the Climatology of the Seasonal Thermocline.

By Copley David C, David C Copley and David C. Copley. Abstract. The effect of stochastic surface heat fluxes on the climatology of the seasonal thermoclin Topics: BEFORE COMPLETING FORM.

The effect of stochastic surface heat fluxes on the climatology of the seasonal : David C. Copley. In Section 5 the stochastic forcing model is applied to variability in the seasonal thermocline.

In this case the driving term is the Ekman suction produced by the curl of the wind stress. For periods shorter than about 6 months, the /?-effect does not play a role, so that the linear response of mixedCited by: Few studies have focused on the heat exchange process in surface and subsurface layers because of the existence of a strong seasonal thermocline at the bottom of thin summer mixed layers (ML).

The seasonal cycle in SSH represents mostly a steric effect associated with a changing heat content of the surface layers above the seasonal thermocline. However, in some locations, notably the North Pacific, a seasonal cycle in SSH is also related to a mass redistribution due to changing wind stress fields (e.g., compare Stammer ), but Cited by: Heat Storage Rate (HSR) is calculated as the time rate of change of the heat content due to variations in the temperature integrated from the surface down to the base of the seasonal thermocline.

The fact that the SST increase is associated with a shallow thermocline indicates that the major contributor to the surface mixed layer heat budget is not the vertical flux of heat through the thermocline but the net surface heat flux through the air–sea interface (i.e., the combination of net shortwave radiation, Cited by:   Previous studies suggest that extratropical atmospheric variability influences the tropics via the seasonal footprinting mechanism (SFM), in which fluctuations in the North Pacific Effect of stochastic surface heat fluxes on the climatology of the seasonal thermocline book (NPO) impact the ocean via surface heat fluxes during winter and the resulting springtime subtropical SST anomalies alter the atmosphere–ocean system over the tropics in the following summer, fall, and Cited by:   In this paper we present a simple univariate stochastic model of midlatitude SST anomalies that accounts for rapid fluctuations in surface heat fluxes, such as might result from the gustiness of sea surface winds.

The parameters of this model are determined from OWS data whose non-Gaussian PDFs are described in section by: This effect has such a large influence in this region that while the 1-year average net surface heat flux is out of the ocean (Table 1), the net effect of the surface heat flux is to warm the mixed layer (Table 2).

During summertime when the ocean is heated, the mixed layer is shallow (generally above 20 m), Cited by: Heat Storage Rate (HSR) is calculated as the time rate of change of the heat content due to variations in the temperature integrated from the surface down to the base of the seasonal thermocline.

For the first time the quantification of heat storage rate in the upper-ocean, based only on in Cited by:   The seasonal synchronization of ENSO events suggests a strong dynamical link between ENSO and the annual cycle.

In this paper, we propose a simple theoretical framework to explain the seasonal synchronization of ENSO events in terms of the effects of the eastern equatorial Pacific annual cycle on the stability of the equatorial Pacific coupled Cited by: Impact of downward heat penetration below the shallow seasonal thermocline on the sea surface temperature Chapter March with 19 Reads How we measure 'reads'.

Stochastic climate models, Part I, Theory. and/or subseasonal variance of the MLD is more strongly controlled by factors other than subseasonal surface fluxes of momentum or buoyancy, such as Author: Klaus Hasselmann. Climate Monitoring.

Climatology has evolved along with our ability to observe and measure the system’s elements including basic temperature and precipitation, cloud types, atmospheric humidity, wind speed and velocity, barometric pressure, soil moisture, and many more.

The velocity core, defined as the strongest along-stream flow at a given depth on a cross-stream vertical section, shifts offshore with increasing depth. Vertical and horizontal shears of the WBC are the strongest on the coastal (cyclonic) side, accompanying a strong gradient of sea surface temperature (SST).

Turbulent Kinetic Energy Regional Climate Model Latent Heat Flux Surface Heat Flux Peltonen, A., and Virta, J. () The effects of climate change on the temperature conditions of lakes, Boreal Environmental Research 3, A mathematical model of the seasonal thermocline.

Report No. Dept. Of Water Resources Eng., Univ. Of Lund Cited by: The essential feature of stochastic climate models is that the non-averaged “weather” components are also retained.

to temperatiire fluct,uations in the seasonal thermocline is given in Part 2 of this paper (Frankignoul & Hasselmann, ). In Part type the meridional heat fluxes by stand-Cited by: Processes that influence sea surface temperature and ocean mixed layer depth variability in a coupled model Michael A.

Alexander and James D. Scott NOAA-CIRES Climate Diagnostics Center, University of Colorado, Boulder Clara Deser National Center for Atmospheric Research, Boulder, Colorado by: An extension of the stochastic climate model due to C. Frankignoul and K. Hasselmann [ Stochastic climate models, part II: application to sea-surface temperature variability and thermocline variability.

Tel –] is proposed that accounts for these by: 4. Annual, Seasonal, and Interannual Variability of Air–Sea Heat Fluxes in the Indian Ocean Article (PDF Available) in Journal of Climate 20(13) July with Reads How we measure 'reads'. The daily variation in heat content of the upper 15 m is determined for the period 19 August - 11 September and compared with the daily variation in net surface energy flux (net flux of total radiation plus surface sensible and latent heat fluxes) measured at the same four B-scale ships during the period 30 August - 18 September.

Stochastic Heat Fluxes PHILIP SURA,MATTHEW NEWMAN, AND MICHAEL A. ALEXANDER NOAA–CIRES Climate Diagnostics Center, Boulder, Colorado (Manuscript received 17 Februaryin final form 6 December ) ABSTRACT The classic Frankignoul–Hasselmann hypothesis for sea surface temperature (SST) variability of an.

the seasonal slackening of surface winds and surface turbulent fluxes, the winter thermal oceanic anomalies become insulated from the surface and the damping effect of negative heat flux feedbacks characteristic of the extratropics (Frankignoul and Kestenare ).

These anomalies persist throughout summer beneath the very shallow summer mixedCited by:   In the Indian Ocean basin the sea surface temperatures (SSTs) are most sensitive to changes in the oceanic depth of the thermocline in the region of the Seychelles Dome.

Observational studies have suggested that the strong SST variations in this region influence the atmospheric evolution around the basin, while its impact could extend far into the Pacific and the by: 4. Seasonal changes in the HPD indicate that the thermal effects of Q net gradually penetrate below the shallow seasonal thermocline due to vertical eddy diffusivity.

Downward heat penetration into the layer below the shallow seasonal thermocline occurs widely throughout the North Pacific, and two-thirds of Q net penetrates below the by: 6. With urban climate science now a fully-fledged field, this timely book fulfills the need to bring together the disparate parts of climate research on cities into a coherent framework.

It is an ideal resource for students and researchers in fields such as climatology, urban hydrology, air quality, environmental engineering and urban by: Abstract.

The fluxes of momentum, energy, and water through the sea surface constitute the principal coupling between ocean and atmosphere. The momentum flux (wind stress) is a main driving force for oceanic motions, in particular for currents near the surface, along continental margins and in the main thermocline, whereas the fluxes of heat and freshwater drive the slower thermohaline Cited by:   However, the cancellation of surface heat fluxes effect with ocean transport divergences effect is not exact and gives rise to SST variability.

Figure 8b and c shows the standard deviation of the residual in SST due to surface heat fluxes and ocean transport, respectively, after removing the cancellation part (see also Fukumori and Wang ).Cited by: 9. Thermocline depth over the last 50 yrs shows an overall deepening of 20 m CalCOFI Observed Thermocline Model Thermocline 0 An eddy-permitting ocean model hindcast captures the observed SST and thermocline variations m Warming is due to large-scale decadal surface heat fluxes combined with southward advection of concomitantly warmed water.

Extratropical air-sea interaction, sea surface temperature variability, and the Pacific Decadal Oscillation (SST) anomalies including surface heat fluxes, upper ocean mixing, thermocline variability, ocean currents, and tropical-extratropical interactions via the atmosphere and ocean.

and thus a stochastic model of the climate system. The effects of the differences in heat capacity between the ocean and land can be seen in Fig.

12, which shows the amplitude of the seasonal cycle in surface temperatures (summer minus winter). The seasonal cycle in the forcing is much larger at higher latitudes than in the tropics, which explains why the seasonal temperature variations in the. Second, the seasonal cycle of thermocline depth also exhibited difference between the two periods (Figure 4c versus Figure 4d).

Generally, in opposition to tropical trade winds, the seasonal cycle of thermocline shifted 1 month earlier during – than during – seasonal thermocline (where they are insulated from surface fluxes) and then remixed in the surface layer the following fall and winter.

Reemergence has been documented over much of the North Atlantic and Pacific (Alexander et al.). This mechanism can. the depth of thermocline at or near the time of maximum heat content. 0 E and are surface and bottom temperatures at this time (Japanese temperatures are from Yoshimura, /).

g' is the reduced gravity (defined in the text). FLORIDA’S OCEANS AND MARINE HABITATS IN A CHANGING CLIMATE • Seasonal Climatology Currents The deep water currents offshore of Florida’s coasts are generally either persistent (such as the Florida Current) or have large-amplitude variability due to their stochastic .The Pacific Decadal Oscillation (PDO) is a robust, recurring pattern of ocean-atmosphere climate variability centered over the mid-latitude Pacific PDO is detected as warm or cool surface waters in the Pacific Ocean, north of 20° the past century, the amplitude of this climate pattern has varied irregularly at interannual-to-interdecadal time scales (meaning time periods of a.Oceanic mixed layer Importance of the mixed layer.

The mixed layer plays an important role in the physical climate. Because the specific heat of ocean water is much larger than that of air, the top m of the ocean holds as much heat as the entire atmosphere above it.

Thus the heat required to change a mixed layer of m by 1 °C would be sufficient to raise the temperature of the.