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首页> 外文期刊>Geophysical Research Letters >Comment on paper: 'Trends of airglow imager observations near Adelaide, Australia' by J. H. Hecht, R. E. Walterscheid, J. Woithe, L. Campbell, R. A. Vincent, and I. M. Reid
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Comment on paper: 'Trends of airglow imager observations near Adelaide, Australia' by J. H. Hecht, R. E. Walterscheid, J. Woithe, L. Campbell, R. A. Vincent, and I. M. Reid

机译：文章评论：J。H. Hecht，R。E. Walterscheid，J。Woithe，L。Campbell，R。A. Vincent和I. M. Reid撰写的“澳大利亚阿德莱德附近的气辉成像仪观测趋势”

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The paper by Hecht et al, [1997], hereinafter called HWWCVR, presents results of upper-mesospheric/lower-thermospheric observations performed from April, 1995 to January, 1996 from Buckland Park Field Station (35 degrees S), near Adelaide, Australia. In the abstract, the authors claim to have obtained 'the first seasonal results from the mid-latitude southern hemisphere mesopause region', regarding (among other parame ters) temperatures. Further, this statement is again repeated in the Conclusions: 'Finally, the work presents the first set of seasonal temperature variations from the mesopause region in the mid latitude southern hemisphere'. The published literature offers much contrary evidence to this claim, and its inclusion would have placed the contribution of the HWWCVR work in its proper context as a confirmation of the earlier investigations. Papers on southern midlatitude mesopause region seasonal temperature variations have been available in the open literature for nearly 30 years, starting with the work of Armstrong [1968] at Camden, Australia, and more recently, the two-year investigation by Greet and Jacka [1989] at Mount Torrens (also near Adelaide), Australia. At southern midlatitude locations other than Australia, there has been the report published by Scheer and Reisin [1990]. This paper contains results from 32 degrees S in Argentina, for both the OH(6-2) and the O-2(0-1) bands (the same airglow bands employed by HWWCVR), and is based on 54 nights of measurements done in four campaigns from 1984 to 1987. Also it reports the typical (warm winter) mesopause variation for the OH layer, and an unusual, cold-winter, temperature variation at the height of the O-2 emission. In addition, Scheer and Reisin found that OH temperatures were warmer than the O-2 temperatures during winter. In HWWCVR's Figure 1, which shows nocturnal mean rotational temperatures of OH and O-2, a similar and confirming behavior is evident. With reference to their Figure I, HWWCVR further state that 'These are the first measurements of mesopause temperatures in the mid-latitude southern hemisphere', neglecting all earlier work from the midlatitude regions of the Southern Hemisphere, such as Argentina [Scheer, 1987, 1995; Scheer and Reisin, 1990; Reisin and Scheer, 1996] and Australia [Armstrong, 1968, 1975; Greet and Jacka, 1989; Hobbs et al., 1996]. Reports from other latitude regions of the Southern Hemisphere, including Brasil [Takahashi et al., 1974, 1977, 1994] and Antarctica [Hernandez et al., 1992, 1995; Greet et al., 1994; Sivjee and Walterscheid, 1994; Williams, 1996] also exist; however, they may not be directly relevant to the primary context of HWWCVR. Temperature data from the SME satellite are also available with complete seasonal coverage between 40 degrees S and 40 degrees N [Clancy and Rusch, 1989], albeit limited in local time coverage. With respect to the observed temperature difference between the OH and the O-2 layers, as shown in Figure 1 of HWWCVR (and comparison with Figure 1 in Scheer and Reisin [1990]), it should be remembered that systematic errors due to uncertainties in transition probabilities [see, e.g., Turnbull and Lowe, 1989; Scheer et al., 1994] as well as instrumental factors [e.g., Hecht et al., 1995] can easily combine to cause systematic uncertainties of the order of 10K for OH. A similar uncertainty would be expected for O-2 temperatures. In response to Hecht et al.'s reply, we simply emphasize the direct relevance of papers in the open literature that predate HWWCVR's confirming report and which present seasonal results from the midlatitude southern hemisphere mesopause region. [References: 22]
机译：Hecht等人的论文[1997]，以下简称HWWCVR，提供了1995年4月至1996年1月在澳大利亚阿德莱德附近的Buckland Park野外观测站（南纬35度）进行的高中层/低层大气观测结果。 。在摘要中，作者声称获得了“（除其他参数外）温度方面的“南半球中纬度中纬度地区的第一个季节结果”。此外，在结论中再次重申了这一说法：“最后，这项工作提出了南半球中纬度更年期地区的第一组季节性温度变化”。公开的文献提供了与该主张相反的证据，将其包括在内将把HWWCVR工作的贡献放在适当的背景下，以证实较早的调查。在开放文献中已有近30年关于中纬度中南部地区季节性温度变化的论文，开始于澳大利亚卡姆登的Armstrong [1968]的工作，最近，由Greet和Jacka [1989]进行的为期两年的调查]在澳大利亚的Mount Torrens（也在阿德莱德附近）。在澳大利亚以外的中南纬度地区，Scheer和Reisin发表了报告[1990]。本文包含来自阿根廷32度的OH（6-2）和O-2（0-1）波段（与HWWCVR使用的相同的气辉波段）有关的结果，并基于54个晚上的测量结果在1984年至1987年的四次活动中，该报告还报告了OH层的典型（暖冬）中绝经变化，以及O-2排放高度处异常的冷冬温度变化。此外，Scheer和Reisin发现，冬季的OH温度比O-2温度高。在HWWCVR的图1中，该图显示了OH和O-2的夜间平均旋转温度，显然具有相似且确定的行为。参照他们的图I，HWWCVR进一步指出，“这些是南半球中纬度中度绝经温度的首次测量结果”，而忽略了南半球中纬度地区（例如阿根廷）的所有早期工作[Scheer，1987， 1995; Scheer and Reisin，1990; Reisin和Scheer，1996年]和澳大利亚[Armstrong，1968年，1975年;格蕾特和杰克（Greet and Jacka），1989年; Hobbs等，1996]。来自南半球其他纬度地区的报告，包括巴西[Takahashi等，1974，1977，1994]和南极洲[Hernandez等，1992，1995]。 Greet et al。，1994; German等，1994。 Sivjee和Walterscheid，1994年;威廉姆斯，1996]也存在。但是，它们可能与HWWCVR的主要上下文没有直接关系。来自SME卫星的温度数据也可以获得完整的季节性覆盖，介于40°S和40°N之间[Clancy and Rusch，1989]，尽管本地时间覆盖范围有限。关于观察到的OH和O-2层之间的温差，如HWWCVR的图1所示（并与Scheer和Reisin [1990]中的图1进行比较），应该记住，由于不确定性导致系统误差。过渡概率[参见，例如，Turnbull和Lowe，1989; Scheer et al。，1994]和工具性因素[e.g.，Hecht et al。，1995]可以很容易地结合起来，导致OH的系统不确定性约为10K。对于O-2温度，预计会有类似的不确定性。在回应Hecht等人的答复时，我们仅强调开放文献中与HWWCVR确认报告之前的论文直接相关，这些论文提供了中纬度南半球中隔区域的季节性结果。 [参考：22]

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