Cheng Xue;Chuanmin Hu;Jennifer P. Cannizzaro;Brian B. Barnes;Lin Qi;Jing Shi;Yuyuan Xie;Benjamin D. Jaffe;David A. Palandro
{"title":"2002 年至 2022 年卡塔尔沿海水域水质遥感情况","authors":"Cheng Xue;Chuanmin Hu;Jennifer P. Cannizzaro;Brian B. Barnes;Lin Qi;Jing Shi;Yuyuan Xie;Benjamin D. Jaffe;David A. Palandro","doi":"10.1109/JSTARS.2024.3454092","DOIUrl":null,"url":null,"abstract":"Over the past two decades, Qatar has undergone significant economic growth and development, yet little information is available on long-term trends in seawater quality around the Qatar Peninsula. This study analyzed spatiotemporal variations of remotely sensed optical water quality (OWQ) parameters in Qatari coastal waters between 2002 and 2022. These OWQ parameters, including chlorophyll-a concentration (Chla), turbidity (Turb), and Secchi disk depth (SDD), along with sea surface temperature, were derived from Moderate-resolution Imaging Spectroradiometer (MODIS)/Aquaobservations after applying an optically shallow-water mask. Additionally, changes in floating algae scum density, an indicator of harmful algal blooms (HABs), were derived from MultiSpectral Instrument (MSI)observations. Strong nearshore–offshore gradients were generally observed for all OWQ parameters (multiannual mean Chla ∼ 0.6–3 mg m\n<sup>−3</sup>\n; Turb ∼ 0.2–3 FNU; and SDD ∼ 5–12 m). SDD was typically greatest in late spring and summer when Chla and Turb were relatively low. OWQ variability in the main territorial sea was mainly driven by suspended sediments, while in the broader Exclusive Economic Zonewas driven by algal blooms. HABs dominated by \n<italic>Margalefidinium polykrikoides</i>\n, \n<italic>Noctiluca scintillans</i>\n, and \n<italic>Trichodesmium</i>\n spp. were frequently observed in deeper (>20 m) waters. Despite Qatar's massive economic development in recent years, declines in Chla and Turb and increased SDD were observed. Qatari coastal waters, however, are warming at a rate of 0.64 °C/decade, ∼2–3 times faster than neighboring Red Sea and Northern Arabian Sea waters, and ∼8 times faster than the global oceans. This thermal stress may pose future challenges for marine ecosystems and the services they provide.","PeriodicalId":13116,"journal":{"name":"IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing","volume":null,"pages":null},"PeriodicalIF":4.7000,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10663846","citationCount":"0","resultStr":"{\"title\":\"Remotely Sensed Water Quality in Qatari Coastal Waters Between 2002 and 2022\",\"authors\":\"Cheng Xue;Chuanmin Hu;Jennifer P. Cannizzaro;Brian B. Barnes;Lin Qi;Jing Shi;Yuyuan Xie;Benjamin D. Jaffe;David A. Palandro\",\"doi\":\"10.1109/JSTARS.2024.3454092\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Over the past two decades, Qatar has undergone significant economic growth and development, yet little information is available on long-term trends in seawater quality around the Qatar Peninsula. This study analyzed spatiotemporal variations of remotely sensed optical water quality (OWQ) parameters in Qatari coastal waters between 2002 and 2022. These OWQ parameters, including chlorophyll-a concentration (Chla), turbidity (Turb), and Secchi disk depth (SDD), along with sea surface temperature, were derived from Moderate-resolution Imaging Spectroradiometer (MODIS)/Aquaobservations after applying an optically shallow-water mask. Additionally, changes in floating algae scum density, an indicator of harmful algal blooms (HABs), were derived from MultiSpectral Instrument (MSI)observations. Strong nearshore–offshore gradients were generally observed for all OWQ parameters (multiannual mean Chla ∼ 0.6–3 mg m\\n<sup>−3</sup>\\n; Turb ∼ 0.2–3 FNU; and SDD ∼ 5–12 m). SDD was typically greatest in late spring and summer when Chla and Turb were relatively low. OWQ variability in the main territorial sea was mainly driven by suspended sediments, while in the broader Exclusive Economic Zonewas driven by algal blooms. HABs dominated by \\n<italic>Margalefidinium polykrikoides</i>\\n, \\n<italic>Noctiluca scintillans</i>\\n, and \\n<italic>Trichodesmium</i>\\n spp. were frequently observed in deeper (>20 m) waters. Despite Qatar's massive economic development in recent years, declines in Chla and Turb and increased SDD were observed. Qatari coastal waters, however, are warming at a rate of 0.64 °C/decade, ∼2–3 times faster than neighboring Red Sea and Northern Arabian Sea waters, and ∼8 times faster than the global oceans. 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Remotely Sensed Water Quality in Qatari Coastal Waters Between 2002 and 2022
Over the past two decades, Qatar has undergone significant economic growth and development, yet little information is available on long-term trends in seawater quality around the Qatar Peninsula. This study analyzed spatiotemporal variations of remotely sensed optical water quality (OWQ) parameters in Qatari coastal waters between 2002 and 2022. These OWQ parameters, including chlorophyll-a concentration (Chla), turbidity (Turb), and Secchi disk depth (SDD), along with sea surface temperature, were derived from Moderate-resolution Imaging Spectroradiometer (MODIS)/Aquaobservations after applying an optically shallow-water mask. Additionally, changes in floating algae scum density, an indicator of harmful algal blooms (HABs), were derived from MultiSpectral Instrument (MSI)observations. Strong nearshore–offshore gradients were generally observed for all OWQ parameters (multiannual mean Chla ∼ 0.6–3 mg m
−3
; Turb ∼ 0.2–3 FNU; and SDD ∼ 5–12 m). SDD was typically greatest in late spring and summer when Chla and Turb were relatively low. OWQ variability in the main territorial sea was mainly driven by suspended sediments, while in the broader Exclusive Economic Zonewas driven by algal blooms. HABs dominated by
Margalefidinium polykrikoides
,
Noctiluca scintillans
, and
Trichodesmium
spp. were frequently observed in deeper (>20 m) waters. Despite Qatar's massive economic development in recent years, declines in Chla and Turb and increased SDD were observed. Qatari coastal waters, however, are warming at a rate of 0.64 °C/decade, ∼2–3 times faster than neighboring Red Sea and Northern Arabian Sea waters, and ∼8 times faster than the global oceans. This thermal stress may pose future challenges for marine ecosystems and the services they provide.
期刊介绍:
The IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing addresses the growing field of applications in Earth observations and remote sensing, and also provides a venue for the rapidly expanding special issues that are being sponsored by the IEEE Geosciences and Remote Sensing Society. The journal draws upon the experience of the highly successful “IEEE Transactions on Geoscience and Remote Sensing” and provide a complementary medium for the wide range of topics in applied earth observations. The ‘Applications’ areas encompasses the societal benefit areas of the Global Earth Observations Systems of Systems (GEOSS) program. Through deliberations over two years, ministers from 50 countries agreed to identify nine areas where Earth observation could positively impact the quality of life and health of their respective countries. Some of these are areas not traditionally addressed in the IEEE context. These include biodiversity, health and climate. Yet it is the skill sets of IEEE members, in areas such as observations, communications, computers, signal processing, standards and ocean engineering, that form the technical underpinnings of GEOSS. Thus, the Journal attracts a broad range of interests that serves both present members in new ways and expands the IEEE visibility into new areas.