141,768 research outputs found
On the structural changes in the Brewer-Dobson circulation after 2000
No full textIn this paper we present evidence that the observed increase in tropical upwelling after the year 2000 may be attributed to a change in the Brewer-Dobson circulation pattern. For this purpose, we use the concept of transit times derived from residual circulation trajectories and different in-situ measurements of ozone and nitrous dioxide. Observations from the Canadian midlatitude ozone profile record, probability density functions of in-situ N2O observations and a shift of the N2O-O3 correlation slopes, taken together, indicate that the increased upwelling in the tropics after the year 2000 appears to have triggered an intensification of tracer transport from the tropics into the extratropics in the lower stratosphere below about 500 K. This finding is corroborated by the fact that transit times along the shallow branch of the residual circulation into the LMS have decreased for the same time period (1993–2003). On a longer time scale (1979–2009), the transit time of the shallow residual circulation branch show a steady decrease of about −1 month/decade over the last 30 years, while the transit times of the deep branch remain unchanged. This highlights the fact that a change in the upwelling across the tropical tropopause is not a direct indicator for changes of the whole Brewer-Dobson circulation
Diedra Brewer-Hohensee Interview
No full textThis interview of Diedra Brewer-Hohensee was conducted by Chandler Smith on September 9, 2025. Interview transcribed by Sam Howat.https://digitalscholar.lsuhsc.edu/oral_hist/1016/thumbnail.jp
Changes in Stratospheric Temperatures and Their Implications for Changes in the Brewer–Dobson Circulation, 1979–2005
No full textSeasonally and vertically resolved changes in the strength of the Brewer–Dobson circulation (BDC) were inferred using temperatures measured by the Microwave Sounding Unit (MSU), Stratospheric Sounding Unit (SSU), and radiosondes. Linear trends in an empirically derived “BDC index” (extratropical minus tropical temperatures), over 1979–2005, were found to be consistent with a significant strengthening of the Northern Hemisphere (NH) branch of the BDC during December throughout the depth of the stratosphere. Trends in the same index suggest a significant strengthening of the Southern Hemisphere branch of the BDC during August through to the midstratosphere, as well as a significant weakening during March in the NH lower stratosphere. Such trends, however, are only significant if it is assumed that interannual variability due to the BDC can be removed by regression of the tropics against the extratropics and vice versa (i.e., exploiting the out-of-phase nature of tropical and extratropical temperatures as demonstrated by previous studies of temperature and the BDC). The possibility that the apparent lower-stratosphere BDC December strengthening and March weakening could point to a change in the seasonal cycle of the circulation is also explored. The differences between a 1979–91 average and 1995–2005 average tropical temperature seasonal cycle in lower-stratospheric MSU data show an apparent shift in the minimum from February to January, consistent with a change in the timing of the maximum wave driving. Additionally, the importance of decadal variability in shaping the overall trends is highlighted, in particular for the suggested March BDC weakening, which may now be strengthening from a minimum in the 1990s
Brewer, D V G, QX10484
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/373483Surname: BREWER
Given Name(s) or Initials: D V G
Military Service Number or Last Known Location: QX10484
Missing, Wounded and Prisoner of War Enquiry Card Index Number: 32357184520
Item: [2016.0049.05801] "Brewer, D V G, QX10484
Calculation of the thermodynamic effect of the Brewer-Engel generalized acid-base reactions of 1:1 intermetallics for non-transition metals Al and Mg with transition metals
No full textThe Brewer-Engel theory has previously provided quantitative predictions of thermodynamic properties and crystal structures of metallic systems which have not previously been subject to generalized Lewis acid-base interactions (L. Brewer, in J.L. Walter, M.R. Jackson and C.T. Sims (eds.), Alloying, ASM International, Metals Park, OH, 1988, pp. 20–27; J. Kouvetakis and L. Brewer, J. Phase Equilib., 14 (1993) 563). The theory has now been extended to cover any combination of metals. A modified Born-Haber type cycle has been used to characterize both covalent and ionic bonding. The understanding of chemical bonding provides the means of predicting a variety of properties. Enhancement of d-bonding is obtained by generalized Lewis acid-base interactions between transition metal atoms (L. Brewer, in J.L. Walter, M.R. Jackson and C.T. Sims (eds.), Alloying, ASM International, Metals Park, OH, 1988, pp. 20–27). In contrast, the d-bonding is reduced when non-transition metals are added to transition metals (L. Brewer, J. Phys. Chem., 94 (1990) 1196). This present paper illustrates the calculation procedures for transition metals added to Al and Mg. The calculations are presented for AB alloys which exhibit CsCl structure for composition of 50 at.% A(transition metal) and 50 at.% B(Al or Mg).補正完畢國
De Vita Hominis Disputationem VI. Anti-Placentinianam in Academia Wittebergensi Disquisitioni publicae exponunt Praeses M. Samuel Hentschel Facult. Phil. Adi. & Respondens Johannes Brewer, Leutschoviensis Hungarus. Ad d. 9. Novemb. A. MDCLXI ...
No full textDE VITA HOMINIS DISPUTATIONEM VI. ANTI-PLACENTINIANAM IN ACADEMIA WITTEBERGENSI DISQUISITIONI PUBLICAE EXPONUNT PRAESES M. SAMUEL HENTSCHEL FACULT. PHIL. ADI. & RESPONDENS JOHANNES BREWER, LEUTSCHOVIENSIS HUNGARUS. AD D. 9. NOVEMB. A. MDCLXI ...
De Vita Hominis Disputationem VI. Anti-Placentinianam in Academia Wittebergensi Disquisitioni publicae exponunt Praeses M. Samuel Hentschel Facult. Phil. Adi. & Respondens Johannes Brewer, Leutschoviensis Hungarus. Ad d. 9. Novemb. A. MDCLXI ... ([1])
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Calculation of thermodynamic effect of the brewer-engel generalized acid-base reactions of the 1 : 1 intermetallics for nontransition metals Al, Mg, with transition metals
No full textThe Brewer-Engel theory has previously provided quantitative predictions of thermodynamic properties and crystal structures of metallic systems which have not previously been subject to generalized Lewis acid-base interactions (L. Brewer, in J.L. Walter, M.R. Jackson and C.T. Sims (eds.), Alloying, ASM International, Metals Park, OH, 1988, pp. 20–27; J. Kouvetakis and L. Brewer, J. Phase Equilib., 14 (1993) 563). The theory has now been extended to cover any combination of metals. A modified Born-Haber type cycle has been used to characterize both covalent and ionic bonding. The understanding of chemical bonding provides the means of predicting a variety of properties. Enhancement of d-bonding is obtained by generalized Lewis acid-base interactions between transition metal atoms (L. Brewer, in J.L. Walter, M.R. Jackson and C.T. Sims (eds.), Alloying, ASM International, Metals Park, OH, 1988, pp. 20–27). In contrast, the d-bonding is reduced when non-transition metals are added to transition metals (L. Brewer, J. Phys. Chem., 94 (1990) 1196). This present paper illustrates the calculation procedures for transition metals added to Al and Mg. The calculations are presented for AB alloys which exhibit CsCl structure for composition of 50 at.% A(transition metal) and 50 at.% B(Al or Mg).補正完畢國內19961206~19961206台灣, 高雄鳳
Brewer, Rosalea Stewart
No full textJ. B. Brewer - brother-in-law. Albert D. Brewer - husband.https://stars.library.ucf.edu/cfm-ch-memoranda-1933/1570/thumbnail.jp
J. D. Dunwoody, Carl Brewer, and C. E. Nichols
No full textTraffic Captain J. D. Dunwoody, Carl Brewer, and C. E. Nichols.https://mavmatrix.uta.edu/specialcollections_startelegram1950s/26718/thumbnail.jp
Brewer, Albert D.
No full textRosalee S. Brewer - wifehttps://stars.library.ucf.edu/cfm-ch-memoranda-1932/1644/thumbnail.jp
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