mesoscale ocean processes n.
Download
Skip this Video
Download Presentation
Mesoscale Ocean Processes

Loading in 2 Seconds...

play fullscreen
1 / 5

Mesoscale Ocean Processes - PowerPoint PPT Presentation


  • 93 Views
  • Uploaded on

Mesoscale Ocean Processes. 1.0˚. What role do mesoscale ocean processes play in establishing the mean climate, its variability, and the response to climate forcing? Developing an eddy-resolving global ocean component for CCSM to address these questions. 0.1˚. Polar Climate Studies.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Mesoscale Ocean Processes' - buckminster-carroll


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
mesoscale ocean processes
Mesoscale Ocean Processes

1.0˚

  • What role do mesoscale ocean processes play in establishing the mean climate, its variability, and the response to climate forcing?
  • Developing an eddy-resolving global ocean component for CCSM to address these questions.

0.1˚

slide2

Polar Climate Studies

Factors influencing the polar amplification of climate change

Shown is the zonally averaged surface air temperature change simulated in a number of coupled models

The role of the ocean, sea ice and coupled feedbacks in the climate variability of the southern ocean

Shown is the regression of absorbed solar radiation on the leading mode of sea ice variability in CCSM2

slide3
Hindcast of the formation and propagation of South Pacific salinity anomalies of 0 = 25.5 from 1966 to 1974.

Model results have given insights into the process (late winter vertical mixing below the mixed-layer) that injects positive anomalies onto deep isopycnals downstream (north) of their wintertime surface outcrops (solid contour across ~ 30S).

The slow propagation toward the equator offers the possibility of predicting near equatorial anomalies years in advance.

slide4

WITH DC (BLUE)

WITHOUT DC (BLACK)

In CCSM3, the ocean model exchanges information with the coupler once a day. Thus, the diurnal cycle (DC) is not explicitly resolved. Instead, its effects are included in solar heating within the ocean model. The simulations produce a diurnal cycle in vertical mixing in the upper ocean in agreement with observations. The figure shows that the Equatorial Pacific mean SST is about 1C warmer with the DC parameterization than without one, in better agreement with the Reynolds and Smith (1994) climatology. Additionally, NINO3.4 standard deviation improves dramatically (0.81 vs. 1.12 C with and without DC, respectively), matching the observational value of about 0.82 C .

multi century coupled carbon climate simulations
Multi-Century Coupled Carbon/Climate Simulations

+2.0

14.1

13.6

-2.0

Surface Temp.

Net CO2 Flux (Pg C/yr)

0

1000

0

1000

year

year

  • Fully prognostic land/ocn BGC and carbon/radiation
  • Atm-Land CO2 flux: 70 PgC/yr ; Atm-Ocean CO2 flux: 90 PgC/yr 
  • Net Land+ocean CO2 flux: 01 PgC/yr
  • “Stable” carbon cycle and climate over 1000y
  • Baseline for : Projection of climate change on natural modes, Detection & attribution, Future climate projections/fossil fuel perturbations
  • Joint work with UC-Berkeley, WHOI