Sentences with phrase «ocean heat uptake over»

Because the 40degree 90degree N region accounts for up to 40 % of the simulated global ocean heat uptake over one hundred years, the process described here influences the global heat uptake efficiency.

Considering the past half century in this context is convenient because we have direct, albeit imprecise, estimates of ocean heat uptake over this period.

Not exact matches

... a pronounced strengthening in Pacific trade winds over the past two decades — unprecedented in observations / reanalysis data and not captured by climate models — is sufficient to account for the cooling of the tropical Pacific and a substantial slowdown in surface warming through increased subsurface ocean heat uptake.

Abstract:... Here we show that a pronounced strengthening in Pacific trade winds over the past two decades — unprecedented in observations / reanalysis data and not captured by climate models — is sufficient to account for the cooling of the tropical Pacific and a substantial slowdown in surface warming through increased subsurface ocean heat uptake.

The key points of the paper are that: i) model simulations with 20th century forcings are able to match the surface air temperature record, ii) they also match the measured changes of ocean heat content over the last decade, iii) the implied planetary imbalance (the amount of excess energy the Earth is currently absorbing) which is roughly equal to the ocean heat uptake, is significant and growing, and iv) this implies both that there is significant heating «in the pipeline», and that there is an important lag in the climate's full response to changes in the forcing.

Second, energy in vs. energy out of the system can hardly balance until we have a better handle on the circulation of the ocean (over 95 % of the heat capacity of Earth) and its rate of heat uptake.

Similarly, Matthew England and colleagues reproduced observed temperature trends by providing the model with the pronounced and unprecedented strengthening in Pacific trade winds over the past two decades — and the winds in turn lead to increased heat uptake by the oceans.

«Nevertheless, neither data set supports the model result of Meehl et al. that the heat uptake in this layer (300 - 700m) in the Pacific dominates over other ocean basins during hiatus periods.»

The cycle of extra heat uptake by the oceans may be over for at least a decade.

Along those lines, Watanabe et al. (2013) showed that ocean heat uptake has become more efficient over the past decade, which is consistent with the observations of Balmaseda et al. (2013), who found an unprecedented transfer of heat to the deep oceans over the past decade, consistent with the modeling in Meehl et al (2013).

Considering all the short - term factors identified by the scientific community that acted to slow the rate of global warming over the past two decades (volcanoes, ocean heat uptake, solar decreases, predominance of La Niñas, etc.) it is likely the temperature increase would have accelerated in comparison to the late 20th Century increases.

- that new estimates of aerosol cooling are low - that new estimates of Ocean heat uptake are low - that therefore observational estimates of climate sensitivity may prove low - that observational estimates are now good enough that they should be preferred over models - that warming below 2C is net beneficial

Even extending to pre-Argo periods, with a long period the errors in ocean heat content values have to be very large to have a major effect on the mean rate of heat uptake over the period.

«In our mor recent global model simulations the ocean heat - uptake is slower than previously estimated, the ocean uptake of carbon is weaker, feedbacks from the land system as temperature rises are stronger, cumulative emissions of greenhouse gases over the century are higher, and offsetting cooling from aerosol emissions is lower.

The notion that over the longer timescales, forced responses dominated (at least for the second half of the past century) is reinforced by data on Ocean Heat Uptake since 1955.

Therefore, subtracting the ocean heat uptake, the total net anthropogenic forcing over this period is somewhere between -0.07 and 2.15 W / m2, with a most likely value of 1.1 W / m2.

frankclimate: It is my understanding that the TOA imbalance average over decade is measured using ocean heat uptake and is 0.7 W / m2 for the ARGO period.

You write, in reference to it: «his choice of ocean heat uptake is based on taking a short term trend over a period in which the observed warming is markedly lower than the longer - term multidecadal value.»

The ocean heat uptake (OHU) figure that I took, its value over the last decade, is actually higher than if I had computed the trend over a longer - term multi-decadal period, and therefore resulted in my sensitivity estimate being higher, not lower.

The slowed surface warming over the past decade seems to be a result of more heat accumulation in the oceans due to short - term increase in ocean heat uptake efficiency.

So why has ocean heat uptake become more efficient over the past decade instead?

Ocean temperature must be measured regularly around the world from the ocean surface to the ocean floor to reduce uncertainty in ocean heat uptake, which accounts for over 90 % of global warOcean temperature must be measured regularly around the world from the ocean surface to the ocean floor to reduce uncertainty in ocean heat uptake, which accounts for over 90 % of global warocean surface to the ocean floor to reduce uncertainty in ocean heat uptake, which accounts for over 90 % of global warocean floor to reduce uncertainty in ocean heat uptake, which accounts for over 90 % of global warocean heat uptake, which accounts for over 90 % of global warming.

If you have good measurements of upper ocean and atmospheric temperatures, then if you had a good decade - long satellite record of the Earth's total radiative energy balance from space — say, if Triana has been launched to in the late 1990s — then you could use conservation of energy to calculate the rate of heat uptake by the deep ocean over the past ten years.

Comparing the trend in global temperature over the past 100 - 150 years with the change in «radiative forcing» (heating or cooling power) from carbon dioxide, aerosols and other sources, minus ocean heat uptake, can now give a good estimate of climate sensitivity.

JK «If I understand correctly your estimate and error for ocean heat uptake are for average rate over the period 1880 - 2011, while your estimate of the forcing rate and associated delta T are for 2011.»

If I understand correctly your estimate and error for ocean heat uptake are for average rate over the period 1880 - 2011, while your estimate of the forcing rate and associated delta T are for 2011.

Over long time periods, this tropical heat uptake is roughly balanced by heat release from the ocean to the atmosphere in other regions closer to the poles.

Supplementary Information (SI), along with the values I calculate from their 1996 — 2005 GMST data, averaged ERF data for 2000 and ocean heat uptake data (taking the trend over 1996 — 2005), and alternatively by accurately digitising ERF ΔF and ΔF − ΔQ values in Marvel et al..

We find that over a wide range of values of diapycnal diffusivity and Southern Ocean winds, and with a variety of changes in surface boundary conditions, the spatial patterns of ocean temperature anomaly are nearly always determined as much or more by the existing heat reservoir redistribution than by the nearly passive uptake of temperature due to changes in the surface boundary conditOcean winds, and with a variety of changes in surface boundary conditions, the spatial patterns of ocean temperature anomaly are nearly always determined as much or more by the existing heat reservoir redistribution than by the nearly passive uptake of temperature due to changes in the surface boundary conditocean temperature anomaly are nearly always determined as much or more by the existing heat reservoir redistribution than by the nearly passive uptake of temperature due to changes in the surface boundary conditions.