8 A sea level fall ~1970-1975 lowering of the erosion level building out of lower shoreplaneowergrowing of old surfaceweathering of old surfaceThe lowering was in the order of20-30 cm(probably an effect of increased evaporation, decreased precipita-tion and/or changed monsoonal regime)The Maldives, 2002
9 The coral is cut and dated at 2 levels. (2) = 1585 +35 BP Example of records of short high sea levels.This coral, today 5-10 cm above mean zero,and “in situ” requites a water depth of ~60cm (according to Laborel), implying ahigher sea level of about +70 cm.The coral is cut and dated at 2 levels.(2) = BP(1) = BP
11 Sea level oscillations in the last millennium (cores from two fens) The 2 swamps became lakes in ~1790 and both dried up in ~1970NB. Peat and shell dates differ by 350 years, a good measure of the local “sea correction”
13 The new sea level curve of the Maldives (Mörner, 2007) recording a number of oscillations driven by the redistribution of ocean water masses. The base line seems to peak at around 1300 BP (excluding any Mid-Holocene maximum as predicted by the loading models).
15 It shows variations – ups and downs – but no trend. The combined observational records (in mm/year) for the last 300 years.It shows variations – ups and downs – but no trend.For year 2100, INQUA gives predictions in line with this record,whilst the IPCC scenarios lie far above – way off – observational data
16 The ”flooding scenario” of IPCC does not concur with observational sea level facts. Therefore, it must be called-off as a mistake.Today, we favour a 2100 value of +5 cm +15 cm
34 Sea level oscillations in the last millennium (cores from two fens) The 2 swamps became lakes in ~1790 and both dried up in ~1970NB. Peat and shell dates differ by 350 years, a good measure of the local “sea correction”
35 Ostracod and Foraminifera SpiroloculinaQuadracythere sp.QuinqueloculinaElphidium sp.
36 Potential for chronology of extreme eventsLaamu Atoll
37 Table 1. Submarine shedding of sand into caves with radiocarbon dating of shells and coral after subtraction of 350 years for regional “sea correction”.
38 Tsunami in AD 1733: (1) in fen records (left), (2) in submarine caves (right) and (3) in a historical record of ”a disastrous flooding in 1733.
39 The Lisbon earthquake–Tsunami is classical and similar events are bound to re-occur in the near-future
41 The reality is much more complicated: When a coastal segment experiences erosion, a ”sea level rise” is often advocated.The reality is much more complicated:in fact, a sea level lowering generally causes more erosion!The clue is often what actually is to be found on the lee-side