Out of Context Tracers in the Sea

🌊🧪 Unlike most chemical plants, the sea has no advance operational blueprint. - Broecker and Peng (1982), Tracers in the Sea

🌊🧪 One of the mysteries of sea water chemistry concerns the P/N ratio. - Broecker and Peng (1982), Tracers in the Sea

these metals at depth in the sediment column, coupled with upward migration and redeposition in the oxygenated upper layers of sediment. This material is also a by-product of hydrothermal activity near the ridge crests. - Broecker and Peng (1982), Tracers in the Sea

🌊🧪 So-called authigenic minerals in sediments are formed by spontaneous crystallization within the sediment or water column. They make up only a small fraction of the total sediment. The most important of these is the iron-manganese oxide material in sediments formed through the reduction of

🌊🧪 This fact has greatly simplified the task of the physical oceanographer interested in mapping water density patterns within the sea. - Broecker and Peng (1982), Tracers in the Sea

years until it is uplifted and exposed again to continental erosion. - Broecker and Peng (1982), Tracers in the Sea

🌊🧪 On average, during the hundredth cycle, the particle bearing the P atom survives destruction and is trapped in the sediment. So our P atom makes 100 round trips of 1000 years each during its stay in the ocean. It then becomes part of the sediment, where it remains for about 100 million

🌊🧪 Unlike most chemical plants, the sea has no advance operational blueprint. - Broecker and Peng (1982), Tracers in the Sea

proportional to the fraction of opal in the sediment. - Broecker and Peng (1982), Tracers in the Sea

the tendency for the opal to dissolve. Second, it is influenced by the rate of rain of non-opaline material. This material dilutes the opal in bottom sediments and thereby cuts down the rate at which it dissolves. For a given thermodynamic driving force, the rate of opal solution will be

🌊🧪 The extent to which the opal raining to the sea floor dissolves depends on three major factors. First, it is influenced by the thermodynamic driving force, which is a function of the temperature, pressure, and H₄SiO₄ content of the bottom water. The greater this difference, the greater

🌊🧪 Sodium, for example, is both abundant in the dissolved matter in rivers and sparingly reactive in the sea. - Broecker and Peng (1982), Tracers in the Sea

(1982), Tracers in the Sea

in oil prices. As can be seen in figure 10-4 the growth rate dropped dramatically. Serious questions with regard to the safety of nuclear power plants and concerns with regard to the storage of the radioactive 'ashes' from these plants have been raised during the last decade. - Broecker and Peng

🌊🧪 One has only to consider the events of the 1970's to realize how hazardous it is to make long range energy use forecasts. A typical forecast of late 1960 called for growth rates of from 3% to 4% per year in energy usage. Then came the Arab oil boycott. Soon after came the rapid increases

🌊🧪 Thus the formation of Basalt and CaCO3 depletes radium and strontium as well as barium and calcium in surface water. - Broecker and Peng (1982), Tracers in the Sea

covering several belt cycles, their distribution would not depend on where they entered or left. Rather, it would depend on the speed of the belts and the efficiency of the monsters. - Broecker and Peng (1982), Tracers in the Sea

lower level, relatively close to their point of ascent). On the lower floor, more people would be at one end of the building than at the other (the steady movement of the lower-level belt would carry the wanderers toward the crowded end). As long as people remained in the funhouse for a period

🌊🧪 If, on a busy Sunday afternoon, we were to snap on the lights suddenly and photograph the distribution of people, we would find many more fun-seekers downstairs than up (the untiring monsters quickly track down those who step from the escalator tops and promptly throw them back down to the

current penetrates northward into the basins of the Pacific; part passes through the Drake passage and starts a second trip around the Antarctic continent. - Broecker and Peng (1982), Tracers in the Sea

🌊🧪 It enters the eastern Atlantic through a break in the Mid-Atlantic Ridge located close to the equator. It enters the Antarctic through the southern end of the western basin of the South Atlantic and joins the eastward floWing circumpolar current. Part of the water in this circumpolar

time required for the pore waters to reach the steady-state concentration. - Broecker and Peng (1982), Tracers in the Sea

constant value. This observation suggests two things. First, some of the solution must occur mainly within the sediment column (the products of the solution process are carried from the sediment by molecular diffusion through the pore spaces). Second, the rate-limiting step for solution must be the

🌊🧪 Now let us consider what is the appropriate value for the exponent, n. Measurements of the dissolved silica content of pore waters in sediments provide us with important clues. As seen in Figure 2-3, these concentrations increase with depth in the sediment column and gradually approach a

🌊🧪 The approximate ratios of these same elements dissolved in deep sea water are 15 atoms of N and 1000 atoms of C for every atom of P. - Broecker and Peng (1982), Tracers in the Sea

(1982), Tracers in the Sea

🌊🧪 After 1000 years of continuous habitation with a steady population of 10,000, their resident archeologist, out of shear boredom, digs a deep trench in an attempt to find relics of their arrival. Finally, when his trench has reached a depth of 300 meters, he succeeds. - Broecker and Peng

in the Weddell Sea is in contact with the atmosphere long enough to be cooled and long enough for dissolved oxygen to be replenished but does not lose a significant portion of its nutrient elements to plants. - Broecker and Peng (1982), Tracers in the Sea

🌊🧪 The high oxygen content of deep water found in the Antarctic adjacent to the Weddell Sea is a consequence of the input of new bottom water in this area. The absence of corresponding anomalies in NO₃ and H₄SiO₄ is, however, unexpected. The new deep water formed during the dark winter

🌊🧪 The approach might be termed 'inverse chemical engineering'. - Broecker and Peng (1982), Tracers in the Sea