On the estimation of energy budgets in stagnant bodies of water

Dobesch, H.

doi:10.1007/bf02245433

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…The time-constants in Table 2, derived with Eq. (6b) show good agreement with the time-constants derived in [ 1 ]. The slightly smaller values of rl in comparison with r 2 for Traunsee and Lunzersee may result from the fact that in [ 1 ] the surface temperature is evaluated by an iterative procedure (by a parametrized form of (1)) with respect to the comparatively large cold inflow of these lakes.…”

Section: Resultssupporting

confidence: 62%

“…It follows from (3a) and (6a) after integration between v = 0 and v = 1 a 114 H. Dobesch form of "Newtons' law of cooling" which has been successfully used in [ 1 ]: …”

Section: Methodsmentioning

confidence: 99%

“…The energy budget of a stagnant water body can be expressed as dU/dt =S +E +H+ Q + B +P, (1) where dU/dt denotes the storage term, that is the change of energy stored in the water with time t, S the net radiation, E the latent heat flux, H the sensible heat flux, Q the "hydrological term", i. e. heat advection due to in-or outflow, B the heat flux into the ground and P the energy change due to precipitation. Q, B and P (Q + B + P = Rt) are in general small compared 0066-6416/81/0030/0111/$ 01.60 112 H. Dobesch with the other components of (l) and Rt is therefore treated as a small random variable.…”

Section: Introductionmentioning

confidence: 99%

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The evaluation of time-constants of stagnant water bodies by correlation functions

Dobesch

1981

Arch. Met. Geoph. Biocl. A.

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The evaluation of the "time-constant" of a water body requires an exact knowledge of the interaction between the meteorological conditions of the surroundings and the resultant properties, e. g. the watersurface temperature. In this paper a method is shown to evaluate this constant from the time infonnations of correlation functions. The results show good agreement with values obtained from other models. Zusammenfassung Die Bestimmung der Zeitkonstante stehender Gew/isser mit KorrelationsfunktionenDie Bestimmung der ,,Zeitkonstante" von Gew~issern erfordert meist eine genaue Kennthis der Wechselwirkungen zwischen den meteorologisch-klimatologischen Bedingungen der Umgebung und den daraus resultierenden Gr6fien, z. B. der Wasseroberfl~ichentemperatur. In der vorliegenden Arbeit wird eine Methode angegeben, mittels der man diese Konstante allein aus der Zeitinformation yon Korrelationsfunktionen gewinnen kann. Die Ergebnisse zeigen gute (3bereinstimmung mit Resultaten, die aus anderen Modei1-ans~itzen gewonnen wurden.

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Section: Resultssupporting

confidence: 62%

“…It follows from (3a) and (6a) after integration between v = 0 and v = 1 a 114 H. Dobesch form of "Newtons' law of cooling" which has been successfully used in [ 1 ]: …”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The evaluation of time-constants of stagnant water bodies by correlation functions

Dobesch

1981

Arch. Met. Geoph. Biocl. A.

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“…Wie in [ 12 ] gezeigt wurde, kann K aus (1) mittels Te und somit auch r aus (5) errechnet werden. Betrachtet man weiters das System Wasser-Luft als einen autoregressiven Prozef5 erster Ordnung [ 13 ], welcher die Zeitreihe der Eingangsfunktion Te(t) und der Ausgangsfunktion T(t) in ein lineares System erster Ordnung verkn0pft, kann G1.…”

Section: Die Bestimmung Der Wasseroberfliichentemperaturunclassified

Zur Abschätzung des Einflusses künstlicher alpiner Stauseen auf das Klima ihrer Umgebung

Dobesch

1982

Arch. Met. Geoph. Biocl., Ser. B

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ZusammenfassungDer m6gliche Einflut~ eines ktinstlichen Stausees im Alpenraum auf das Klima seiner Umgebung wird, ausgehend von einfachen Klimadaten, in zwei Schritten abgesch~itzt: Zun~ichst wird mittels mehrerer L6sungen der WSxmeleitungsgleichung mit intemen WSrmequellen die Berechnung der zu erwartenden Oberfl~chentemperatur demonstriert, anschliet~end wird ein einfaches Diffusionsmodei1 zur Verlagerung der iiber dem See thermisch modifizierten und mit Wasserdampf angereicherten Luftmasse tiber die leeseitigen Uferzonen zur Anwendung gebracht. Diese Modifizierungen bleiben bei Seen der betrachteten Gr6t~enordnung relativ gering und shad nut in den unmittelbaren Uferbereichen ausgepr~gt. Summary The Influence of Man-made Alpine Lakes Upon the Local ClimateThe possible influence of man-made lakes in the Alpine Regions upon the climate of their surroundings is evaluated from simple climatological datas in two steps: firstly the calculation of the expected water surface temperature is demonstrated by several solutions of the equation of heat conduction with internal heat sources and then a simple diffusion model is applied for the transfer of the thermically modified and water vapour enriched air mass across the lake and the lee side inshore areas. The results show, that the modifications at lakes of small and medium size are relatively small, only in the immediate inshore areas they are marked more distinctly.

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Energy and water budget of a tropical man-made lake

Dobesch¹

1983

Limnology of Parakrama Samudra — Sri Lanka

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On the estimation of energy budgets in stagnant bodies of water

Cited by 4 publications

References 7 publications

The evaluation of time-constants of stagnant water bodies by correlation functions

The evaluation of time-constants of stagnant water bodies by correlation functions

Zur Abschätzung des Einflusses künstlicher alpiner Stauseen auf das Klima ihrer Umgebung

Energy and water budget of a tropical man-made lake

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