The effect of the 11-year solar-cycle on the temperature in the upper-stratosphere and mesosphere: Part II numerical simulations and the role of planetary waves

Hampson, J.; Keckhut, Philippe; Hauchecorne, Alain; Chanin, Marie-Lise

doi:10.1016/j.jastp.2005.03.005

Cited by 19 publications

(23 citation statements)

References 33 publications

(49 reference statements)

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“…The observed responses from HALOE also agree with those from more recent model studies (e.g. Hampson et al, 2005;Matthes et al, 2004;.…”

Section: Sc-like Max Minus Min T(p) Valuessupporting

confidence: 89%

“…There have been several recent modeling studies of a dynamical response to the solar cycle forcing that indicate a reinforcement of the normal radiative temperature response in the mesosphere at solar maximum (Kodera and Kuroda, 2002;Hampson et al, 2005). Koshravi et al (2002) conducted 2-D model simulations to see whether they could produce a dynamically-induced temperature response to the solar flux forcing.…”

Section: Discussion and Summarymentioning

confidence: 99%

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On the observed changes in upper stratospheric and mesospheric temperatures from UARS HALOE

Remsberg

2008

Ann. Geophys.

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Abstract. Temperature versus pressure or T (p) time series from the Halogen Occultation Experiment (HALOE) of the Upper Atmosphere Research Satellite (UARS) have been extended and re-analyzed for the period of 1991-2005 and for the upper stratosphere and mesosphere in 10-degree wide latitude zones from 60 S to 60 N. Even though sampling from a solar occultation experiment is somewhat limited, it is shown to be quite adequate for developing both the seasonal and longer-term variations in T (p). Multiple linear regression (MLR) techniques were used in the re-analyses for the seasonal and the significant interannual, solar cycle (SC-like or decadal-scale), and linear trend terms. Plots of the amplitudes and phases for the interannual (QBO and subbiennial) terms are provided. A simple SC-like term of 11-yr period was fitted to the time series residuals after accounting for the seasonal and interannual terms. Highly significant SC-like responses were found for both the upper mesosphere and the upper stratosphere. The phases of these SC-like terms were checked for their continuity with latitude and pressurealtitude; the larger amplitude responses are directly in-phase with that of standard proxies for the solar flux variations. The analyzed, max minus min, responses at low latitudes are of order 0.5 to 1 K, while at middle latitudes they are as large as 3 K in the upper mesosphere. Highly significant, linear cooling trends were found at middle latitudes of the middle to upper mesosphere (−1.5 to −2.0 K/decade), at tropical latitudes of the lower mesosphere (about −0.5 K/decade), and at 2 hPa (of order −1 K/decade). Both the diagnosed solar cycle responses and trends from HALOE for the mid to upper mesosphere at middle latitudes are larger than simulated with most models, perhaps an indication of decadal-scale dynamical forcings that are not being simulated so well.

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“…The observed responses from HALOE also agree with those from more recent model studies (e.g. Hampson et al, 2005;Matthes et al, 2004;.…”

Section: Sc-like Max Minus Min T(p) Valuessupporting

confidence: 89%

Section: Discussion and Summarymentioning

confidence: 99%

On the observed changes in upper stratospheric and mesospheric temperatures from UARS HALOE

Remsberg

2008

Ann. Geophys.

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“…The present study is an extension of the two previous companion papers Hampson et al, 2005). This study is focused on the zonally asymmetric nature of the response.…”

Section: Introductionmentioning

confidence: 93%

“…An improved understanding of the mechanism of the solar cycle influence comes from recent simulations performed with a 3D mechanistic middle atmosphere model, reported in a second companion paper (Hampson et al, 2005). The model does not include the troposphere, so planetary waves are generated artificially by modulating the lower boundary geopotential height.…”

Section: Introductionmentioning

confidence: 99%

The effect of the 11-year solar-cycle on the temperature in the upper-stratosphere and mesosphere—Part III: Investigations of zonal asymmetry

Hampson¹,

Keckhut²,

Hauchecorne³

et al. 2006

Journal of Atmospheric and Solar-Terrestrial Physics

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“…Climatology of temperature difference (in Kelvin) between model runs with solar maximum forcing and with solar minimum forcing, for a pair of model runs with the planetary wave forcing multiplied by a factor C = 1.8, at four different latitudes: (a) 2.5 • N, (b) 22.5 • N, (c) 52.5 • N, (d) 82.5 • N. FromHampson et al (2005).…”

mentioning

confidence: 99%

Signature of the 11-Year Cycle in the Upper Atmosphere

Chanin

2007

Space Sci Rev

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In the last 45 years I have studied the thermal structure of the atmosphere from the thermosphere down to the stratosphere, and found evidence of its variability in relationship with the change of solar irradiation during the 11-year solar cycle. I would review, in the light of recent model results, the measurements which I had made since the 1960s and which, for some of them, did not find any explanation at the time of their publication. The data were obtained by two different techniques, rockets and lidars and correspond to different regions of the atmosphere from the upper thermosphere to the stratosphere. The expectation was until recently that the atmosphere should be warmed by an increase of solar flux in the course of the solar cycle due to the increase of UV flux. It has been shown to be the case in the tropical stratosphere and at all latitudes in the upper thermosphere. But, at high and mid latitudes and at other altitudes, the reverse situation was found to exist and, until recently, this cooling observed in parts of the atmosphere with increasing solar flux had never been simulated by models. In addition to reviewing our own data, the paper will present recent results using other dataset which support our observations. It is only recently that we succeeded with a model able to tune the forcing by planetary waves at the tropopause level and thus reproduce such behaviour

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The effect of the 11-year solar-cycle on the temperature in the upper-stratosphere and mesosphere: Part II numerical simulations and the role of planetary waves

Cited by 19 publications

References 33 publications

On the observed changes in upper stratospheric and mesospheric temperatures from UARS HALOE

On the observed changes in upper stratospheric and mesospheric temperatures from UARS HALOE

The effect of the 11-year solar-cycle on the temperature in the upper-stratosphere and mesosphere—Part III: Investigations of zonal asymmetry

Signature of the 11-Year Cycle in the Upper Atmosphere

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