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Showing papers in "Annales Geophysicae in 1986"


Journal Article
TL;DR: In this article, the Mann-Kendall rank statistic has been used to detect abrupt climate change and to localize the date of its beginning in the early 20th century.
Abstract: Provides a method which allows the detection of an abrupt climatic change and which localizes approximately the date of its beginning. The identification of such a change is made by means of a non-parametric test, the Mann-Kendall rank statistic. The efficiency of this test has been compared to the efficiency of other usual techniques used for detecting a change and the reliability of the localization of the change has been analysed using a Monte-Carlo technique. The data used are the long-term series of average northern hemisphere temperature, the instrumental records of temperature and precipitation for western european countries and the long-term european reconstructed series. Most of the temperature series exhibit a general long-term warming which supports the reality of the early 20th century northern hemisphere warming, as noted by many authors. However, this study shows that an abrupt change towards a warming occurred generally around 1900+/-25 years and that we are still experiencing this longterm warm climate.

201 citations


Journal Article
TL;DR: The GEISA data bank as discussed by the authors contains spectroscopic information on 323,521 lines corresponding to 36 molecules and 79 isotopic species in the spectal range 3 x 10 to the -6th/cm to 17,879/cm.
Abstract: The 1984 update of the GEISA data bank, containing spectroscopic information on 323,521 lines corresponding to 36 molecules and 79 isotopic species in the spectal range 3 x 10 to the -6th/cm to 17,879/cm, is discussed. The bank compiles parameters describing the radiation absorption or emission properties of gases involved in the atmospheres of the earth and planets. Values of a new exponent which summarized the variation of the collision halfwidth with temperature are given for 10 molecules. Six new molecules, HOCl, N2, CH3Cl, H2O2, H2S, and HCOOH, are included in this edition.

72 citations



Journal Article
TL;DR: In this paper, EFLUM-ARTICLE-1986-002 Record created on 2005-09-08, modified on 2017-02-23, and published in 2017.
Abstract: Note: 4: 417-424 Reference EFLUM-ARTICLE-1986-002 Record created on 2005-09-08, modified on 2017-02-23

40 citations














Journal Article
TL;DR: In this paper, a simple ecoulement simple applique aux perturbations atmospheriques de la haute stratosphere and de leurs effets sur les fluctuations du vent and de la temperature is presented.
Abstract: Modele 3 D d'un ecoulement simple applique aux perturbations atmospheriques de la haute stratosphere et de leurs effets sur les fluctuations du vent et de la temperature. Etude de la reponse dynamique aux contraintes dues a l'activite solaire

Journal Article
TL;DR: In this paper, the hole electron distribution functions observed by the DE-1 satellite within inverted-V events at altitudes of between 9000 km and 15,000 km were examined as a possible free energy source for exciting Z-mode radiation through cyclotron maser resonance.
Abstract: The hole electron distribution functions observed by the DE-1 satellite within inverted-V events at altitudes of between 9000 km and 15,000 km are examined as a possible free energy source for exciting Z-mode radiation through cyclotron maser resonance. In the DE-1 observations the hole distribution function had center velocities varying between 8000 km/s and 20,000 km/s, with the radii varying between 2000 km/s and 10,000 km/s. The observed distribution function is fitted by an exponential function around the center of the hole, and is used to calculate growth rates of Z-mode radiation. Growth rates as high as 0.001 of the electron gyrofrequency are obtained. It is also shown that the observed hole distribution functions can excite Z-mode radiation at wave frequencies slightly above the gyrofrequency, and wave propagation angles slightly below 90 deg in the source region. The results suggest that the hole distribution function could provide additional amplification for Z-mode waves in the auroral zone.