Emissions of anthropogenic carbon dioxide (CO2) to the atmosphere and the
consequent effects of ... more Emissions of anthropogenic carbon dioxide (CO2) to the atmosphere and the
consequent effects of climate change and ocean acidification on coral reef ecosystems have
motivated significant interest in describing and understanding the CO2–carbonic acid system
of diverse coral reef environments. Although numerous studies have been successful in
monitoring reef metabolism both in the field and in the laboratory, physical and biological
forcings produce distinct conditions among environments. Due to the geographic isolation
and associated difficulties with measuring marine carbon chemistry in waters of the Papaha
¯naumokua¯kea Marine National Monument (PMNM), relatively few studies have described
the CO2–carbonic acid system and carbonate saturation state gradients of these waters. Yet,
PMNM remains one of the largest conservation areas in the world with extensive and diverse
coral reef ecosystems that could offer valuable insight into our current and future understanding
about regional and global impacts of ocean acidification. In order to provide a broad
overview of latitudinal trends and features of the marine carbon system in PMNM waters,
continuous measurements for surface seawater fugacity of CO2 (fCO2) and pH were collected
during August 2011 and July 2012 cruises of the NOAA Ship Hi’ialakai. These measurements indicate that pH and fCO2 are three times more variable in nearshore monument
waters relative to open ocean transect measurements. This variability can be observed
up to 50 km away from the nearest reef and is likely the result of the direct and significant
impact of coral reef metabolism on marine carbon chemistry around the islands and atolls.
The relationship between total alkalinity and dissolved inorganic carbon is consistent with
net calcification which creates an alkalinity sink throughout PMNMwaters. Additionally, our
measurements show clear latitudinal trends in fCO2, pH, and aragonite saturation state that
are influenced by environmental forcings, including temperature, wind speed, and residence
time of the water. Collectively, our results suggest that coral reefs located at the northernmost
atolls of PMNM may be the most susceptible to the adverse impacts of climate change
and ocean acidification.
Emissions of anthropogenic carbon dioxide (CO2) to the atmosphere and the
consequent effects of ... more Emissions of anthropogenic carbon dioxide (CO2) to the atmosphere and the
consequent effects of climate change and ocean acidification on coral reef ecosystems have
motivated significant interest in describing and understanding the CO2–carbonic acid system
of diverse coral reef environments. Although numerous studies have been successful in
monitoring reef metabolism both in the field and in the laboratory, physical and biological
forcings produce distinct conditions among environments. Due to the geographic isolation
and associated difficulties with measuring marine carbon chemistry in waters of the Papaha
¯naumokua¯kea Marine National Monument (PMNM), relatively few studies have described
the CO2–carbonic acid system and carbonate saturation state gradients of these waters. Yet,
PMNM remains one of the largest conservation areas in the world with extensive and diverse
coral reef ecosystems that could offer valuable insight into our current and future understanding
about regional and global impacts of ocean acidification. In order to provide a broad
overview of latitudinal trends and features of the marine carbon system in PMNM waters,
continuous measurements for surface seawater fugacity of CO2 (fCO2) and pH were collected
during August 2011 and July 2012 cruises of the NOAA Ship Hi’ialakai. These measurements indicate that pH and fCO2 are three times more variable in nearshore monument
waters relative to open ocean transect measurements. This variability can be observed
up to 50 km away from the nearest reef and is likely the result of the direct and significant
impact of coral reef metabolism on marine carbon chemistry around the islands and atolls.
The relationship between total alkalinity and dissolved inorganic carbon is consistent with
net calcification which creates an alkalinity sink throughout PMNMwaters. Additionally, our
measurements show clear latitudinal trends in fCO2, pH, and aragonite saturation state that
are influenced by environmental forcings, including temperature, wind speed, and residence
time of the water. Collectively, our results suggest that coral reefs located at the northernmost
atolls of PMNM may be the most susceptible to the adverse impacts of climate change
and ocean acidification.
Uploads
Papers by Andrea K. Kealoha
consequent effects of climate change and ocean acidification on coral reef ecosystems have
motivated significant interest in describing and understanding the CO2–carbonic acid system
of diverse coral reef environments. Although numerous studies have been successful in
monitoring reef metabolism both in the field and in the laboratory, physical and biological
forcings produce distinct conditions among environments. Due to the geographic isolation
and associated difficulties with measuring marine carbon chemistry in waters of the Papaha
¯naumokua¯kea Marine National Monument (PMNM), relatively few studies have described
the CO2–carbonic acid system and carbonate saturation state gradients of these waters. Yet,
PMNM remains one of the largest conservation areas in the world with extensive and diverse
coral reef ecosystems that could offer valuable insight into our current and future understanding
about regional and global impacts of ocean acidification. In order to provide a broad
overview of latitudinal trends and features of the marine carbon system in PMNM waters,
continuous measurements for surface seawater fugacity of CO2 (fCO2) and pH were collected
during August 2011 and July 2012 cruises of the NOAA Ship Hi’ialakai. These measurements indicate that pH and fCO2 are three times more variable in nearshore monument
waters relative to open ocean transect measurements. This variability can be observed
up to 50 km away from the nearest reef and is likely the result of the direct and significant
impact of coral reef metabolism on marine carbon chemistry around the islands and atolls.
The relationship between total alkalinity and dissolved inorganic carbon is consistent with
net calcification which creates an alkalinity sink throughout PMNMwaters. Additionally, our
measurements show clear latitudinal trends in fCO2, pH, and aragonite saturation state that
are influenced by environmental forcings, including temperature, wind speed, and residence
time of the water. Collectively, our results suggest that coral reefs located at the northernmost
atolls of PMNM may be the most susceptible to the adverse impacts of climate change
and ocean acidification.
consequent effects of climate change and ocean acidification on coral reef ecosystems have
motivated significant interest in describing and understanding the CO2–carbonic acid system
of diverse coral reef environments. Although numerous studies have been successful in
monitoring reef metabolism both in the field and in the laboratory, physical and biological
forcings produce distinct conditions among environments. Due to the geographic isolation
and associated difficulties with measuring marine carbon chemistry in waters of the Papaha
¯naumokua¯kea Marine National Monument (PMNM), relatively few studies have described
the CO2–carbonic acid system and carbonate saturation state gradients of these waters. Yet,
PMNM remains one of the largest conservation areas in the world with extensive and diverse
coral reef ecosystems that could offer valuable insight into our current and future understanding
about regional and global impacts of ocean acidification. In order to provide a broad
overview of latitudinal trends and features of the marine carbon system in PMNM waters,
continuous measurements for surface seawater fugacity of CO2 (fCO2) and pH were collected
during August 2011 and July 2012 cruises of the NOAA Ship Hi’ialakai. These measurements indicate that pH and fCO2 are three times more variable in nearshore monument
waters relative to open ocean transect measurements. This variability can be observed
up to 50 km away from the nearest reef and is likely the result of the direct and significant
impact of coral reef metabolism on marine carbon chemistry around the islands and atolls.
The relationship between total alkalinity and dissolved inorganic carbon is consistent with
net calcification which creates an alkalinity sink throughout PMNMwaters. Additionally, our
measurements show clear latitudinal trends in fCO2, pH, and aragonite saturation state that
are influenced by environmental forcings, including temperature, wind speed, and residence
time of the water. Collectively, our results suggest that coral reefs located at the northernmost
atolls of PMNM may be the most susceptible to the adverse impacts of climate change
and ocean acidification.