Reply to: Parker A.Comment on "Low-frequency sea level variation and its correlation with climate events in the Pacific"
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摘要:
First,we would like to thank Parker for his discussion and comments on our work.Parker's main concern [1] is that the sea level is oscillating with important multi-decadal periodicities but absolutely not positively accelerating.He also argued that the global mean sea level (GMSL) acceleration computed by Jin et al.[2] seemed too large.His similar concern had also appeared in the comment of local sea level rise on Long Island,New York [3].The most important difference between these two commented papers is that the former computes the sea level acceleration globally,while the latter locally.Parker quoted both,individual tide gauges and the time series of GMSL by satellite radar altimeter from the University of Colorado CU Sea Level Research Group.
Individual tide-gauge records with enough length and quality can be used to compute the local sea level accelerating trend.However,the length should be longer than 60 years [4] to avoid large oscillations due to long-term tidal effects,which has also been confirmed by Parker himself [5].As we known,individual tide-gauge records only represent the mean sea level variation within localized area.