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from article Earth's interior

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Contour plots of the radial component of the magnetic field at the core–mantle boundary (a) for the year 1715 and (b) for 1980. The contour interval is 100 microteslas; solid-line contours represent flux into the core, and broken-line contours…

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from article Circadian clock (plants)

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Model of the Arabidopsis circadian clock, showing light input (bold arrow), the central oscillator (large box), and output/response (tinted arrows). Light signals synchronize the clock via the cryptochromes (cry) and phytochromes (phy). These are…

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from article Hydrological consequences of global warming

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The hydrologic cycle is characterized by evaporation and transpiration from the surfaces; transport of water vapor in the atmosphere by the wind, clouds, and precipitation; and water storage in snow, glaciers, groundwater, and oceans. Units: 1000…

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from article Hydrological consequences of global warming

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Spatial patterns of climate model projections of (a) precipitation, (b) soil moisture, (c) runoff, and (d) evaporation for 2090–2099 under the mid-range A1B emission scenario from the Intergovernmental Panel for Climate Change 2007. (Climate Change…

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from article Hyperbolic geometry

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Examples of simple hyperbolic knots and links. (a) Figure-8 knot. (b) Whitehead link.

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from article Micrometeorology

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Soundings of temperature versus height for (a) day time and (b) nighttime obtained by radiosonde measurements during the Wangara experiment near Hay, New South Wales, Australia, in 1967. Soundings are shown for 9 A.M. through 9 P.M. on day 33 of the…

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from article Micrometeorology

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The 3 P.M. sounding from Fig. 1a showing the layers of the daytime convective boundary layer.

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from article Gibberellins

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ent-Gibberellane carbon skeleton showing the carbon numbering system and ring designations.

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from article Gibberellins

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The GA-biosynthetic pathway in higher plants via 2-methylerythritol-4-phosphate (MEP). The biologically active end products of the pathway are GA1, GA3, and GA4. The general diterpene precursor trans-geranylgeranyldiphosphate (GGPP) is formed in…

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