Global Climate

Barichivich, Jonathan; Osborn, Timothy J.; Harris, Ian; Schrier, Gerard van der; Jones, Philip

doi:10.1175/bams-d-20-0104.1

Cited by 67 publications

(11 citation statements)

References 184 publications

(226 reference statements)

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“…Atmospheric CO 2 concentrations are rising each year due to human activities. According to the State of the Climate in 2019, the annual average of global atmospheric CO 2 concentration increased from 0.6 ± 0.1 ppm year −1 in the 1960s to 2.3 ppm year −1 in 2009-2018, and reached 2.5 ± 0.1 ppm in 2018-2019, an estimated overall increase of 95 ppm (from 315 to 410 ppm) (Dunn et al, 2020). Current predictions suggest that CO 2 concentrations will rise to 680 ± 50 ppm by the year 2050 and the partial pressure of carbon dioxide (pCO 2 ) will reach 900 ± 50 ppm by 2100 (IPCC RCP 6.0 projections, Pachauri et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effects of Ocean Acidification on Coral Endolithic Bacterial Communities in Isopora palifera and Porites lobata

Yang

Tang

et al. 2020

Front. Mar. Sci.

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Endolithic microbes in coral reefs may act as a nutrient source for their coral hosts. Increasing atmospheric CO2 concentrations are causing ocean acidification (OA), which may affect marine organisms and ecosystems, especially calcifying organisms such as reef-building corals. However, knowledge of how OA affects marine microbes remains limited, and little research has been done on how coral endolithic communities respond to shifting environmental baselines. In this study, the endolithic communities of two common shallow water coral species, Isopora palifera and Porites lobata, were examined to investigate the microbial community dynamics under OA treatments. The colonies were placed in an environment with a partial pressure of carbon dioxide (pCO2) of 1,000 or 400 ppm (control) for 2 months. Several I. palifera colonies bleached and died at 1,000 ppm pCO2, but the P. lobata colonies remained unaffected. Inversely, the endolithic community in P. lobata skeletons showed significant changes after OA treatment, whereas no significant dynamics were observed among the I. palifera endoliths. Our findings suggest that the skeletal structures of different coral species may play a key role in corals host and endoliths under future high-OA scenarios.

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Section: Introductionmentioning

confidence: 99%

Effects of Ocean Acidification on Coral Endolithic Bacterial Communities in Isopora palifera and Porites lobata

Yang

Tang

et al. 2020

Front. Mar. Sci.

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“…On the contrary, the year 2019 registered above-average annual precipitation (120-130 % in southwestern Sweden), although strongly varying monthly (e.g., record-low in April, highest precipitation in May), and was warmer-than-average both in Sweden and globally (Dunn et al, 2020). In the study area the contrasting hydroclimate conditions of 2018 and 2019 expressed in annual average discharges of Örekilsälven to GF of 18.5 and 29.0 m 3 /s, respectively (Fig.…”

Section: Contrasting Hydroclimatic Conditions In 2018/2019 and Ba/ca Shift In Benthic Foraminiferamentioning

confidence: 90%

Drought recorded by Ba/Ca in coastal benthic foraminifera

Brinkmann

Barras

Jilbert

et al. 2021

Preprint

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Abstract. Increasing occurrences of extreme weather events, such as the 2018 drought over northern Europe, are a concerning issue under global climate change. High resolution archives of natural hydroclimate proxies, such as rapidly accumulating sediments containing biogenic carbonates, offer the potential to investigate the frequency and mechanisms of such events in the past. Droughts alter the barium (Ba) concentration of near-continent seawater through the reduction in Ba input from terrestrial runoff, which in turn may be recorded as changes in the chemical composition (Ba/Ca) of foraminiferal calcium carbonates accumulating in sediments. However, so far the use Ba/Ca as a discharge indicator has been restricted to planktonic foraminifera, despite the high relative abundance of benthic species in coastal, shallow-water sites. Moreover, benthic foraminiferal Ba/Ca has mainly been used in open ocean records as a proxy for paleo-productivity. Here we report on a new geochemical dataset measured from living (CTG-labelled) benthic foraminiferal species to investigate the capability of benthic Ba/Ca to record changes in river runoff over a gradient of contrasting hydroclimatic conditions. Individual foraminifera (Bulimina marginata, Nonionellina labradorica) were analyzed by laser-ablation ICP-MS over a seasonal and spatial gradient within Gullmar Fjord, Swedish west coast during 2018–2019. The results are compared to an extensive meteorological and hydrological data set, as well as sediment and pore-water geochemistry. Benthic foraminiferal Ba/Ca correlates significantly to riverine runoff, however, the signals contain both spatial trends with distance to Ba-source, and species-specific influences such as micro-habitat preferences. We deduce that shallow-infaunal foraminifera are especially suitable as proxy for terrestrial Ba input and discuss the potential influence of water-column and pore-water Ba cycling. While distance to Ba-source, water depth, pore-water geochemistry, and species-specific effects need to be considered in interpreting the data, our results demonstrate confidence in the use of Ba/Ca of benthic foraminifera from near-continent records as proxy for past riverine discharge and to identify periods of drought.

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“…As an example, this last century is marked with a set of environmental damages such as acid rain, depletion of the ozone layer, global warming, and the greenhouse effect. The concentration of different harmful gases in the atmosphere increased by 43% relative to 1990, CO 2 accounts for about 80% of this, according to the US National Oceanic and Atmospheric Administration quoted in the WMO Bulletin [13]. Developing countries, such as Algeria are currently facing a deterioration of air quality due to many factors.…”

Section: Introductionmentioning

confidence: 99%

IoT monitoring system for air quality assessment and collecting data

Tayeb

Benallal

Benabadji

et al. 2022

IJEECS

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The composition of the air has been visibly altered as a result of human activity, resulting in what we term air pollution. It is no longer necessary to prove the effects on ecosystems and human health. Under these conditions, governments all around the world are working to address this issue, notably in the area of real-time air quality monitoring. The implementation of a data provider is a necessary step in achieving this goal. In that case, this study presents a hardware and software solution to provide a low-cost deployable device to acquire environmental data related to AP such as CO, CO2, NH3, and NO2, along with temperature and humidity. In addition to an user interface development, a complete circuit layout and a set of software criteria are set up to ensure a reliable implementation, data collection, and network communications. The results demonstrated that the device is capable of effectively obtaining real-time data. The analysis results indicate a link between environmental conditions and parameter values. This system deployment will ultimately contribute to providing a more elaborate mapped data distribution, according to a better understanding of our environment.

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Global Climate

Cited by 67 publications

References 184 publications

Effects of Ocean Acidification on Coral Endolithic Bacterial Communities in Isopora palifera and Porites lobata

Effects of Ocean Acidification on Coral Endolithic Bacterial Communities in Isopora palifera and Porites lobata

Drought recorded by Ba/Ca in coastal benthic foraminifera

IoT monitoring system for air quality assessment and collecting data

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