Vapour pressures are increased by evaporation from nearby warm oceans. Values from coastal places in Table 6.2 are notably higher than those from Alice Springs, in central Australia. Particularly low relative humidities occur inland; values at 3 p.m. in January east of Carnarvon on the coast of Western Australia are only about 15 per cent, on account of high temperatures and winds from the dry interior. Dewpoints may be only 2°C in winter in the interior of Queensland (Figure 6.9) and in Alice Springs (Table 6.2).
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