Summary
The present study covers the soil layer surface to a depth of 120 cm. It is found that for the sandy and loamy sand soil of the arid zone of Jodhpur, there are 2 types of thermal regime patterns viz.
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1)
Summer pattern: In this soil temperature decreases from the surface all the way during maximum temperature epoch. During minimum temperature epoch of the air, temperature increases from surface to 30 cm depth and thereafter it decreases.
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2)
Winter pattern: In this, soil temperature decreases only upto 30 cm depth and thereafter increases during maximum temperature epoch. During minimum temperature epoch, the temperature increases continuously from the surface all the way. The summer pattern lasts from mid-March to mid-October with breaks during peak monsoon periods when winter pattern is obtained. Conditions are favourable for upward movement of moisture in vapour phase during the morning hours and for downward flow during afternoon hours throughout the year. The gradients are stronger from mid-March to end of October.
Zusammenfassung
Die Untersuchung bezieht sich auf die Bodenschicht von der Oberfläche bis 120 cm Tiefe. Für sandigen und lehmigen Sandboden in der ariden Zone von Jodhpur wurden zwei Typen der Temperaturverteilung festsgestellt: 1. Im Sommer nimmt zur Zeit des Maximums der Lufttemperatur die Bodentemperatur von der Oberfläche bis 120 cm Tiefe ab; zur Zeit des Minimums der Lufttemperatur nimmt sie von der Oberfläche bis 30 cm Tiefe zu, darunter aber ab. 2. Im Winter nimmt die Bodentemperatur zur Zeit des Maximums der Lufttemperatur nur bis 30 cm Tiefe ab und darunter zu; zur Zeit des Minimums der Lufttemperatur nimmt sie kontinuierlich bis 120 cm Tiefe zu.
Die Sommerform der Verteilung der Bodentemperatur findet sich von Mitte März bis Mitte Oktober mit einer Unterbrechung im Höhepunkt der Monsunperiode, wo die Winterform vorherrscht. Für eine Aufwärtsbewegung der Feuchtigkeit in Dampfform sind die Bedingungen das ganze Jahr hindurch in den Morgenstunden günstig, für die Abwärtsbewegung aber in den Nachmittagsstunden.
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Krishnan, A., Rao, G.G.S.N. Soil temperature regime in the arid zone of India. Arch. Met. Geoph. Biokl. B. 27, 15–22 (1979). https://doi.org/10.1007/BF02245906
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DOI: https://doi.org/10.1007/BF02245906