ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 32 (1983), S. 77-87 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Es wurde gefunden, dass die Temperaturschwankungen in der Stratosphäre in 30 km Höhe in der 22jährigen Periode 1957–1978 annähernd in Phase mit der Sonnenaktivität verliefen. Die Maxima und Minima der Sommer-Mitteltemperatur der Schicht von 10 bis 30 mb traten innerhalb von 2 Jahren um den korrespondierenden Maxima und Minima der Sonnenaktivität auf. Diese Beziehung ist auf Breiten über 30°N beschränkt. In der Stratosphäre oberhalb 30 km Höhe kann eine Spur eines Sonneneinflusses nur über mittleren und niedrigen Breiten festgestellt werden, wo die Amplitude mit der Höhe zunimmt. Die beobachteten stratosphärischen Temperaturänderungen im Verlaufe des Zyklus der Sonnenaktivität fallen möglicherweise in den Bereich von Modellberechnungen der UV-Strahlung und der Vermehrung solarer Teilchen beim Sonnenfleckenmaximum.
    Notes: Summary Stratospheric temperatures near 30 km were found to have been approximately in-phase with the solar cycle during the 22-year period 1957–1978. Maxima and minima in summertime 10–30 mb layer mean temperatures occurred within 2 years from corresponding solar activity maxima and minima, the relationship being confined to latitudes greater than 30°N. In the stratosphere above about 30 km a possible solar trace can be identified only over moderate and low latitudes the amplitude of which increases with height. The observed stratospheric temperature variations during the solar activity cycle are possibly within model calculations of UV and solar particle enhancements at solar maximum.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 33 (1983), S. 229-236 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Mit Messungen mit einer Ozonsonde wurde die Abnahme des Ozons am Boden auf einem halbstädtischen Platz im Norden Griechenlands bestimmt. Die Berechnung gründet sich auf Messungen der Beseitigung des Ozons hauptsächlich durch den chemischen Kontakt mit dem Boden in der stabilen Schichtung über dem Boden in der Nacht. Die obere Grenze der bestimmten Ozonabnahme betrug 1,1 · 1031 pro cm2 und Sekunde. Die Luftqualität und meteorologische Daten aus dem Gebiet werden ebenfalls besprochen.
    Notes: Summary Measurements with a tethered sonde ozone system are used to estimate the ozone sink at the ground in a semi-urban place in northern Greece. The estimate is based on measurements of the ozone removal, mostly by chemical contact with the ground, as the stable layer forms above the ground at night. An upper limit of the estimated ozone sink during this case study amounted to 1.1 · 1011 molecules cm−2 sec−1. Air quality and meteorological data for the region are also discussed.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 36 (1986), S. 135-145 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Die Analyse der Ozonmessungen von Stationen mit Dobson Photometer zeigt, daß die fünf Monate von Dezember 1982 bis April 1983 in den Außertropen der Nordhalbkugel von ungewöhnlich niedrigen Ozonkonzentrationen gekennzeichnet waren. Dieser Zeitraum fällt mit dem Maximum der stratosphärischen Aerosolbelastung in mittleren Breiten, der dem Ausbruch des El Chichón folgte, zusammen. Sowohl die Ozon- als auch die Aerosolanomalie ist die größte, bezogen auf die Referenzperiode 1963–1983 und das Ozonminimum wird daher dem Vulkanausbruch zugeschrieben.
    Notes: Summary Analysis of total ozone measurements by stations using Dobson spectrophotometry shows that the five months from December 1982 through April 1983 was a period of anomalously low ozone over Northern Hemisphere extratropical latitudes. This interval coincides with the period of maximum stratospheric aerosol burden at midlatitude following the eruption of El Chichón. Both ozone and aerosol anomalies are the largest observed in the reference period 1963–1983 and the ozone minimum has therefore been attributed to the volcanic eruption.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 55 (1995), S. 215-221 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Summary The relationships between smoke concentrations, measured at two monitoring stations in Athens by the ASTM (American Society for Testing and Materials) and the OECD (Organization for Economic Co-Operation and Development) methods are studied by using a sample of 738 mean daily values of simultaneous measurements during the period 1984–1986. It is shown that an exponential model, different for each monitoring station, with smoke concentrations in COH (coefficient of haze) as the independent variable and smoke concentrations in μgr/m3 as the dependent variable, was the most appropriate for transforming smoke data from COH to μgr/m3. Also it is shown that the transformation models can be applied independent of the prevailing meteorological conditions. Finally some tentative conclusions are derived concerning the long term variations of smoke concentrations in μgr/m3 for the period 1977–1990 and 1973–1990 at the two monitoring stations respectively. The trend analysis has shown that pollution abatement efforts resulted in an about 10% per year decreasing trend in smoke concentrations, during the period 1986–1990, at these two Athenian stations.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 69 (1998), S. 119-135 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Summary The total ozone decline during the past twenty years, especially strong during the winter-spring season poleward from 50° N, is well established with known average trends of 5–7% per decade. This study presents a number of additional characteristics such as ozone-mass deficiency (O3MD) from the pre- 1976 base average, and areal extent with negative deviations greater than∼2 and∼3δ. Gridded satellite data combined with ground-based total ozone maps, permit calculations of daily and regional ozone deficiencies from the anthropogenically undisturbed average ozone levels of the 1960s and early 1970s. Then the quantity of the O3MD and the changes in surface area, with deficiencies larger than-10 and-15% are integrated for the 1 January to 15 April period for each of the last 20 years, and compared. In addition, the polar vortex extent during the last 10 years is determined using the PV at 475°K. The quantity of the O3MD within the sunlit part of the vortex is shown to contribute from∼15 to 35% of the overall ozone deficiency within the-10% contours over the area 35–90°N. The ozone deficiency, integrated for the first 105 days of each year, has increased dramatically from ∼2,800Mt in the early 1980s to∼7,800Mt in the 1990s, exceeded 12,000Mt in the winter-springs of 1993 and 1995. The latter quantity is comparable with the average O3MD over the same Southern latitudes in the last ten austral springs. During the 1990s over the 35–90° latitudes the average ozone deficiency in the Southern hemisphere belt is less than over the Northern hemisphere belt by∼40%. It is known that the main ozone decline is observed in the lower stratosphere and the ozone loss over the Arctic is very sensitive to decreasing stratospheric temperatures; negative 50hPa monthly anomalies greater than 4°C have occurred during 7 of the springs in the last decade, thus possibly facilitating doubling the area with negative ozone deviations greater than-10% in the 1990s to∼5,000.106km2 and nearly tripling the O3MD as stated above. The changes in total eddy heat fluxes as a proxy indicator of the long wave perturbations are positively correlated with the ozone deficiency in the 45–75°N. The strong anticorrelation between the ozone deficiency in the region〉55° N. versus the 35–50° N belt is discussed in relation to possible transport of air masses with low ozone from the sub-tropics, which in some years are the dominant reason for the observed ozone deficiency.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 31 (1982), S. 231-235 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Statistische Tests eines möglichen Zusammenhanges zwischen dem Gesamtozon über Arosa und Indizes der südlichen Oszillation geben zwar unbestimmte aber nicht aussichtslose Hinweise: Die linearen Korrelationskoeffizienten zwischen 12monatig übergreifenden Mittelwerten sind für beide Hälften der Periode 1935–1980 statistisch signifikant, während die Kohärenzen in der ersten, aber nicht in der zweiten Hälfte der Periode statistisch signifikant sind. Die Phasen sind jedoch in beiden Perioden übereinstimmend. Unsere Untersuchung zeigt, daß eine Beziehung zwischen dem Gesamtozongehalt über Arosa und der südlichen Oszillation in dem Sinne besteht, daß, wenn der mittlere Luftdruck am Boden im zentralen tropischen Südpazifischen Ozean niedrig ist, während er im Gebiet von Indonesien hoch ist, der Ozongehalt über Arosa eine Tendenz zu höheren Werten zeigt und umgekehrt.
    Notes: Summary Statistical tests of a possible association between total ozone at Arosa and indices of the Southern Oscillation give indefinite but not unpromising answers: linear correlation coefficients between 12-month running means are statistically significant for both halves of the period 1935–1980, whereas the squared coherences are statistically significant in the first but not in the second half of the period. The phases in both periods are consistent, however. Our investigation shows that a relationship between the total ozone amounts at Arosa and the Southern Oscillation, must be in the sense that when the sea level mean pressure is low over the central tropical South Pacific Ocean while it is high in the Indonesian region, the total ozone amounts at Arosa tend to be large, and conversely.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 32 (1983), S. 129-134 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Die mit Raketensonden gewonnene mittlere monatliche Temperaturstruktur der Stratosphäre wird mit der aus Strahlungsmessungen von Nimbus-5 SCR abgeleiteten für die Monate Juni und Dezember 1973 und für März und September 1974 verglichen. Der Vergleich zeigt eine gute Übereinstimmung nur in den Druckniveaus zwischen 5 mb und 15 mb, das ist in der oberen mittleren Stratosphäre. Die Differenz zwischen den mit Satelliten und den mit Raketensonden gewonnenen Temperaturen ist am größten in der Stratopausenregion, möglicherweise zufolge der zur Ableitung der strahlungsäquivalenten Temperaturen angewendeten Methode.
    Notes: Summary Rocketsonde monthly mean temperature structure of the stratosphere is compared with that derived from Nimbus-5 SCR radiance measurements for the solsticial months in 1973 and for the equinoctial months in 1974. The comparison shows good agreement only at pressure levels between about 5 mb and 15 mb (upper-middle stratosphere). The satellite minus rocket bias is highest at the stratopause region possibly due to the constraints applied in retrieving the radiance equivalent temperatures.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 28 (1979), S. 341-348 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Eine Analyse der Monatsmittel der Gesamtwolkendecke in den Tropen weist die Existenz einer quasibiennalen Oszillation der Gesamtwolkendecke nach. Die Amplitude dieser Oszillation liegt zwischen 1 und 2,5% in den zonalen Anteilen der Gesamtwolkendecke über den äquatorialen und südlichen Breiten. Diese Oszillation wurde auch mit den entsprechenden Oszillationen der stratosphärischen Temperaturen verglichen. Die quasibiennale Oszillation der tropischen Gesamtwolkendecke ist längerzeitigen Schwankungen überlagert, was im Text besprochen wird.
    Notes: Summary An analysis of monthly mean total cloud cover fractions in the tropics showed the existence of a quasi-biennial oscillation in total cloud cover. The amplitude of the oscillation is between 1 and 2.5 percent in zonal total cloud cover fractions, over the equatorial and southern latitudes. This oscillation is also compared with the corresponding oscillations in zonal mean stratospheric temperatures. The QBO in the tropical total cloud cover is superimposed on longer-term fluctuations (trends) which are discussed in the text.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 257 (1975), S. 113-115 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Many investigators have reported short term relationships between variable solar activity and weather, but the relationships have often been unconnected and even contradictory. The results reported here seem to form a logical extension of other results recently reported1"4. Roberts and Olson4 ...
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1573-0662
    Keywords: Stratospheric NO2 column ; total NO2 column
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract A programme of ground-based stratospheric and total NO2 column measurements was instituted at the Laboratory of Atmospheric Physics (40.5° N, 22.9° E) in August 1985. We present here the results of the first two years of measurements with a modified Canterbury filter photometer, details of which are given in the text. The stratospheric NO2 column, obtained at twilight during low local NO2 levels, shows the seasonal variation with monthly mean values of about 6×10-15 molec. cm-2 in the summertime to about 2.2×10-15 molec. cm-2 in the wintertime. These measurements compare well with measurements obtained with different instruments by other groups at similar latitudes (about 40° N) but in different places. Also, the asymmetry of the evening-to-morning stratospheric NO2 over Thessaloniki was found to be on the average equal to 1.58. Total NO2 column over Thessaloniki has a pronounced seasonal variation with amplitude of 0.68 matm. cm which can be explained partly from measured local NO2 sources which discharge in the mixing layer and partly from photolysis of the NO2 reservoir species.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...