Miriam Jackson

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[1] An in-depth Sr-Nd-Pb-He-Os isotope and trace element study of the EMII-defining Samoan hot spot lavas leads to a new working hypothesis for the origin of this high 87 Sr/ 86 Sr mantle end-member. Systematics of the Samoan fingerprint include (1) increasing 206 Pb/ 204 Pb with time-from 18.6 at the older, western volcanoes to 19.4 at the present-day hot(More)
Postcopulatory sexual selection theory has come a long way since the evolutionary implications of sperm competition were first spelled out by Parker (1970). However, one of the most enduring questions remains: why do females copulate with multiple males? Here we show that females copulating with multiple males lay more eggs than those copulating repeatedly(More)
Glacier movement is resisted partially by debris, either within glaciers or under glaciers in water-saturated layers. In experiments beneath a thick, sliding glacier, ice containing 2 to 11% debris exerted shear traction of 60 to 200 kilopascals on a smooth rock bed, comparable to the total shear traction beneath glaciers and contrary to the usual(More)
The discovery over the past two decades of viable microbial communities within glaciers has promoted interest in the role of glaciers and ice sheets (the cryosphere) as contributors to subglacial erosion, global biodiversity, and in regulating global biogeochemical cycles. In situ or in-field detection and characterisation of microbial communities is(More)
Early stage convection can be predicted using continuous Forecast Indices derived from microwave radiometer thermodynamic soundings. Prediction can be extended to regional scale using three-dimensional humidity mapping via combined GNSS0 F 1 and radiometer observations. We present radiometer observations preceding a catastrophic convective storm that struck(More)
Early stage convection has been detected in temperature and humidity parameters derived from ground-based microwave radiometer profiler observations. This capability can be extended to regional scales using combined GNSS 1 and radiometer data for three-dimensional humidity mapping. We present examples of radiometer-derived thermodynamic parameters during(More)
Mass-balance measurements describe the difference between accumulation and ablation and therefore the annual climate response of a glacier. Such measurements are the standard observation of glacier 'health' and when coupled with frontal, area or volume observations can describe the dynamic response of a glacier to climate over longer time scales. Mass(More)
Calibration and validation of glacier mass balance models typically rely on mass balance data derived from measurements at individual points, often along altitudinal gradients, thus neglecting much of the spatial variability of mass balance. Remote sensing data can provide useful additional spatially distributed information, e.g. on surface conditions such(More)
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