A 1500 year record of river discharge inferred from fluvial-marine sediments in the Australian subtropics

Abstract

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Intensification of the East Australian Current After ∼1400 CE

“…(2019) on Swallow Lagoon sediments and Coates‐Marnane et al. (2018) on Moreton Bay sediments located close to our sites indicate persistently higher rainfall over Eastern Australia during the LIA, which is inconsistent with a more El Niño‐like mean state but consistent with a more positive SAM phase and La Niña‐like mean state (Figure 2l). Higher rainfall in subtropical eastern Australia during the LIA is in good agreement with rainfall proxy records from the western and equatorial Pacific (Griffiths et al., 2016; Yan et al., 2011), which suggest La Niña‐like conditions prevailing during the LIA.…”

Concentrations of legacy persistent organic pollutants and naturally produced MeO-PBDEs in dugongs (Dugong dugon) from Moreton Bay, Australia

“…Moreton Bay is one of the largest estuarine bays in Australia and lies between the mouth of the Brisbane River and large barrier islands, i.e. Moreton Island and Stradbroke Island (Fig S1) (Coates-Marnane et al, 2018). With the Brisbane River running through Brisbane, which is Australia's third largest city with 2.4 million inhabitants in 2018, as well as other waterways ending in Moreton Bay, pollutants from urban and agricultural sources are continuously flushed into the bay (Toms et al, 2006;Mueller et al, 2011;Duodu et al, 2017;Coates-Marnane et al, 2018).…”

“…Moreton Island and Stradbroke Island (Fig S1) (Coates-Marnane et al, 2018). With the Brisbane River running through Brisbane, which is Australia's third largest city with 2.4 million inhabitants in 2018, as well as other waterways ending in Moreton Bay, pollutants from urban and agricultural sources are continuously flushed into the bay (Toms et al, 2006;Mueller et al, 2011;Duodu et al, 2017;Coates-Marnane et al, 2018). From a toxicological point of view, Sirenia are one of the least investigated groups among marine mammals (O'Shea et al, 2018).…”

Postflood Monitoring in a Subtropical Estuary and Benchmarking with PFASs Allows Measurement of Chemical Persistence on the Scale of Months

“…During the wet season, tropical cyclones and low-pressure systems can provide brief periods of intense rainfall that greatly increase estuary flow. 15 If the rainfall is sufficiently intense, the subsequent flood can flush some contaminants out of the estuary, while there may be a pulse input of other contaminants such as pesticides. We hypothesize that the change in contaminant concentrations in the estuary during a dry period following a flood can be used for persistence estimation.…”

“…These low flow rates compared to the size of the drainage basin (13600 km 2 ) are a consequence of upstream flow regulation and drinking water abstraction. During the wet season, tropical cyclones and low-pressure systems can provide brief periods of intense rainfall that greatly increase estuary flow . If the rainfall is sufficiently intense, the subsequent flood can flush some contaminants out of the estuary, while there may be a pulse input of other contaminants such as pesticides.…”