Nantucket Maria Mitchell Association Announces Harbor Acidification Monitoring Project Launch Event

August 8, 2024

NANTUCKET, MA—The Nantucket Maria Mitchell Association (MMA) announces the launch of its Harbor Acidification Monitoring Project made possible by funding from ReMain Nantucket, Great Harbor Yacht Club Foundation, Osceola Foundation, Sociable Weaver Foundation, and in collaboration with the Town of Nantucket’s Harbormaster. The MMA will deploy an oceanographic buoy in the Nantucket Harbor to begin a continuous data collection and publication monitoring project, the first of its kind on Nantucket. This project will collect and publish continuous data on seawater acidity (pH), dissolved oxygen, temperature, total algae, dissolved nitrates, and salinity (conductivity). This data will create the "Mitchell Curve," a long-term, permanent record of ocean acidification in Nantucket Harbor.


Due to its unique geographic, hydrographic, ecologic, and cultural setting, Nantucket Harbor has one of the last remaining healthy eelgrass (Z. marina) beds in New England. The shape of Nantucket Harbor forces incoming sea water to pass over eelgrass beds, which sequester the water’s carbon dioxide. Seagrasses can consume more carbon dioxide per acre than rainforests, and noticeably lower the acidity of the water around them. The MMA believes the confluence of these factors also make it one of the best locations to investigate the impacts of healthy eelgrass on the commercially valuable Nantucket bay scallop (A. irradians). These parameters will provide the public and cross-agency decisionmakers with essential, real-time information for more effective conservation, restoration, and management of critical habitats and the valuable commercial and recreational fisheries that depend on them.


Nantucket may become a sanctuary with healthy water quality in the future, benefiting a wide range of ocean life. It is important to understand how our harbor’s chemistry is changing during both short- and long-term tidal intervals, so that we can better comprehend the anthropogenic effects on the harbor. Young shellfish shells can dissolve in acidic water, and large fish may become stressed and unhealthy. Even naturally decomposing shells are beneficial to water quality, releasing basic calcium carbonate that lowers the acidity of the ocean. Beyond pH changes, understanding the impact of nutrient loading is crucial to understanding the health of the harbor and mitigating perilous effects on the eelgrass and bay scallop. By receiving constant real-time data, we can observe how the water chemistry fluctuates related to shortterm occurrences, such as runoff events, and long-term occurrences, such as weather trends, and analyze the effects those fluctuations may have on Nantucket’s sea life.


The MMA is thrilled to make the data collected through the “Mitchell Curve” available to all. This open-source data format will not only ensure transparency in scientific communication but also will create opportunities for students locally and afar to monitor the harbor in real time, explore opportunities to mitigate the effects of warming oceans, and potentially give rise to informing data driven decisions that support a healthy Nantucket Harbor. Additionally, the buoy and its data stream will provide the Maria Mitchell Association interns with incredible opportunities to handle and maintain advanced water quality equipment, process real-time data, and effectively communicate that data with community collaborators and to the public at large.


The Maria Mitchell Association was founded in 1902 to preserve the legacy of Nantucket native astronomer, naturalist, librarian, and educator, Maria Mitchell. After she discovered a comet in 1847, Mitchell’s international fame led to many achievements and awards, including an appointment as the first female professor of astronomy at Vassar College. Maria Mitchell believed in “learning by doing” and today that philosophy is reflected in the MMA’s mission statement, programs, research projects, and other activities. The Maria Mitchell Association operates two observatories, a natural science museum, an aquarium, a research center, and preserves the historic birthplace of Maria Mitchell. A wide variety of science and history-related programming is offered throughout the year for people of all ages.


###

For Immediate Release

August 8, 2024

Contact: Jónelle Gurley

programs@mariamitchell.org

Recent Posts

By Jascin N. Leonardo Finger December 15, 2025
[1855] On the 12 th [December] at 8 o’clock, I found a comet in Cetus. It is probably that seen by Bruhns in Berlin on Nov. 12. It is round and bright and moved so rapidly that in an hour I was certain of its change of place. From 8 to 10 ½ it had moved about half the diameter of my field of view. I tho’t it varied in its light but of this I am not quite certain, as I at times changed from one instrument to another, and I cannot be certain that my eye was not somewhat affected by the size of different powers, so as to affect my judgement. I would give a good deal for it to be my own possession, because it would convince me that I was not declining in vigor.  This comet, unlike her won comet of October 1, 1847, is fairly fast moving – it would take many calculations and much time for her comet to illustrate its movement – beyond just the appearance of its “tail.” Maria had made earlier comments in the month about if being a hard year – the hardest of her life. The loss of friends, her mother’s illness. But this, with other matters, buoyed her spirit and she talked about her “blessings.” This comet was one seen by Maria only eight years after her comet discovery so it seems interesting that she feels she is slipping and not as “vigorous” – she is only thirty-seven years old at this date. JNLF
By Jascin N. Leonardo Finger December 9, 2025
Another re-blog. I came across this recently while looking through my computer files. I want to re-blog it in memory of Jean Hughes, an incredibly gifted islander, who was directly influential in the lives of so many island children and those in need. She was the Coffin School Trustee’s President for many years and I had the honor to serve as a trustee under her. She passed away in the summer of 2025. Jeanie loaned me this from her family collections as she thought I would enjoy it. She knew me better than I thought she did. With love. 1830s Chinese silk to be exact. It literally floated into my lap as I sat reading a letter.  A letter from a young Nantucket girl to her grandparents. A young girl who just several years before had moved from tiny Nantucket Island to San Francisco with her mother to join her father. He had moved for better work and a better life. Nantucket was in an economic decline. Reading this treasure trove of letters – loaned to me by a friend who is a descendant of these people I mention – was like spying on them. Now, when I read Mitchell family letters and writing it is slightly different for me. Having worked in the Mitchell House for so long, I feel like they are a part of my family. This batch of letters was different however. I felt like they know I read their letters – as if they were looking over my shoulder or sitting on the other side of the room aghast. I felt like they thought no one ever would – or at the very least an outsider – read this correspondence. The worse letter one was the son writing to his mother upon receipt of her letter telling him of his father’s death. That was hard. Made harder because he thought his father was fine – he was as of the last letter a month or two before. Made harder as I lost my own Father a little over a year ago. I knew how he felt – but cannot imagine receiving a letter that is about a month old telling one of such horrible news. He had not seen his father in several years. I could speak to my Father, visited him monthly, and was there with him. That was not an easy letter to read. The silk fabric piece is quite beautiful – and still pristine – as if it was just folded into the letter yesterday. She wanted to share with her grandparents the dress that her cousin had brought to her directly from Hong Kong. A cousin, who was likely pregnant – or “sick” as was written but it was obvious what “sick” meant (yes, pregnancy was looked at as an illness in a way – and there were high rates of infant and mother mortality during and immediately following birth). The cousin had travelled back and forth to Hong Kong on the China Trade with her husband it seems but due to the pregnancy had to be put off with family or others until the baby was born. This was a common practice for the wives of whale captains who might go to sea with their husbands. They were put off with other whaling families or missionaries in far off ports so that they could have their baby where others could help. Sometimes they were put off months in advance. And, did you know that Nantucket whale wives were the FIRST to go to sea with their captains husbands? They set the trend – after all, we were the whaling capital of the world. At least, until we lost that title for multiple reasons. I digress. The other piece that leads one to realize that money was to be had – at least for the cousin – is that she didn’t bring fabric – she brought the dress already made in Hong Kong. Yes, it would have been less costly there than in the United States but it shows there was extra money for spending. And, there was enough excess fabric inside the dress for this young girl to cut off a piece of it and send it to her grandparents. Making them feel as if they were a part of her daily life – and making her feel that way too. So far from home. On the other side of the continent with Nantucket Sound in the midst, to boot. JNLF
December 1, 2025
“If you don’t look, you don’t see. You have to go and look.” -Edith Andrews
Show More