What A Nut!— Invasive Species Week

Changing main blog now. Everything before this is my study abroad experience in Costa Rica

What if we told you that a group of gelatinous animals helps control the planet’s climate? Your disbelief would be salp-able! 

Salps are filter-feeding gelata related to pyrosomes that pack up plankton produce into poo pellets that precipitate into the deep, capturing carbon from the atmosphere and tucking it away in the depths of the hydrosphere.

Thanks to local photographers Michelle Manson and Joe Platko for the salp selfies! Joe’s photo on top shows a solitary Pegea confoederata ready to birth the same kind of long chain that Michelle found in her lower photo! 

(The pink orbs are the salps’ guts, and these tubular animals are essentially a passing pasta strainer for plankton!)

This past weekend marked the first anniversary of the launch of NASA’s latest ocean color satellite, PACE 🛰️! Happy birthday PACE!

Sharpening Our View of Climate Change with the Plankton, Aerosol, Cloud, ocean Ecosystem Satellite

As our planet warms, Earth’s ocean and atmosphere are changing.

Climate change has a lot of impact on the ocean, from sea level rise to marine heat waves to a loss of biodiversity. Meanwhile, greenhouse gases like carbon dioxide continue to warm our atmosphere.

NASA’s upcoming satellite, PACE, is soon to be on the case!

Set to launch on Feb. 6, 2024, the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission will help us better understand the complex systems driving the global changes that come with a warming climate.

Earth’s ocean is becoming greener due to climate change. PACE will see the ocean in more hues than ever before.

While a single phytoplankton typically can’t be seen with the naked eye, communities of trillions of phytoplankton, called blooms, can be seen from space. Blooms often take on a greenish tinge due to the pigments that phytoplankton (similar to plants on land) use to make energy through photosynthesis.

In a 2023 study, scientists found that portions of the ocean had turned greener because there were more chlorophyll-carrying phytoplankton. PACE has a hyperspectral sensor, the Ocean Color Instrument (OCI), that will be able to discern subtle shifts in hue. This will allow scientists to monitor changes in phytoplankton communities and ocean health overall due to climate change.

Phytoplankton play a key role in helping the ocean absorb carbon from the atmosphere. PACE will identify different phytoplankton species from space.

With PACE, scientists will be able to tell what phytoplankton communities are present – from space! Before, this could only be done by analyzing a sample of seawater.

Telling “who’s who” in a phytoplankton bloom is key because different phytoplankton play vastly different roles in aquatic ecosystems. They can fuel the food chain and draw down carbon dioxide from the atmosphere to photosynthesize. Some phytoplankton populations capture carbon as they die and sink to the deep ocean; others release the gas back into the atmosphere as they decay near the surface.

Studying these teeny tiny critters from space will help scientists learn how and where phytoplankton are affected by climate change, and how changes in these communities may affect other creatures and ocean ecosystems.

Climate models are one of our most powerful tools to understand how Earth is changing. PACE data will improve the data these models rely on.

The PACE mission will offer important insights on airborne particles of sea salt, smoke, human-made pollutants, and dust – collectively called aerosols – by observing how they interact with light.

With two instruments called polarimeters, SPEXone and HARP2, PACE will allow scientists to measure the size, composition, and abundance of these microscopic particles in our atmosphere. This information is crucial to figuring out how climate and air quality are changing.

PACE data will help scientists answer key climate questions, like how aerosols affect cloud formation or how ice clouds and liquid clouds differ.

It will also enable scientists to examine one of the trickiest components of climate change to model: how clouds and aerosols interact. Once PACE is operational, scientists can replace the estimates currently used to fill data gaps in climate models with measurements from the new satellite.

With a view of the whole planet every two days, PACE will track both microscopic organisms in the ocean and microscopic particles in the atmosphere. PACE’s unique view will help us learn more about the ways climate change is impacting our planet’s ocean and atmosphere.

Stay up to date on the NASA PACE blog, and make sure to follow us on Tumblr for your regular dose of sPACE!

Sky Walk on Puente 3 (Bridge 3) in Monteverde, Costa Rica

None Like It Hot

By Joylette Portlock

July. Long known across the U.S. for fireworks, barbecues, and a desire to stay cool any way we can. Whether it’s air conditioning, swimming pools, beaches or popsicles, the dog days of summer are often reminders that as humans, our comfort depends on an experienced ambient temperature roughly somewhere between 59 and 77 degrees (Fahrenheit).

But what if, instead of 77, it’s a full 40 degrees more: 117 degrees, like it was in California on July 6? Or 105, like it was in Japan last week? Then, it’s more than an issue of comfort; our lives depend on finding a way to stay cool, and in fact more than a hundred people have perished in heat-related deaths globally already this year.

Life in this new age, the Anthropocene, is marked by many things, including a human-caused increase in global heat, commonly referred to as global warming, or climate change. Risk from heat (or wildfires, or floods) is no longer something we have to rely on the overwhelmingly strong scientific consensus about global warming to tell us; every year, climate change impacts are becoming more and more obvious to everyone, whether you have a degree in climate science or not.

Weather and climate are different. Weather is what happens on a day-to-day basis. Climate is the range of weather that we expect and consider normal (i.e., summer is hot) – but normal is changing.

Photo: Graph showing the amount of CO2 in the atmosphere and human population from We Are Nature, on display until September 2018.

We’re now up to over 400 consecutive warmer-than-average months and counting. Carnegie Museum of Natural History’s collections, which span more than 140 years, can help show these shifts in many ways. One of the most important things we can do is to make connections and show the relevance between the basic scientific principles underlying natural phenomena and the evidence all around us; between what’s happening globally and what’s happening locally.

Photo: The growth of plants collected today versus 100 years ago in the same locations, shown in We Are Nature, corroborates the observation of increasingly earlier springtime by documenting earlier maturation of these species.

The globe’s increasing heat is a result of fossil fuel use, food production, and our land use practices. We need energy and food, of course; but it’s critical that we recognize that the systems we impact also impact us. It’s not just our actions, but our interactions with the world around us that are the story. To understand what’s happening and improve our interactions with nature, we have to look at the big picture, and work to meet our needs in ways that minimize disruption to the overall system.

As summer heat waves get longer, more numerous, and more intense (and it seems the whole world is on fire, with deadly fires everywhere from California to Greece to inside the Arctic Circle) one connection is obvious: our need to be cool.

Joylette Portlock, Ph.D., is associate director of science and research at Carnegie Museum of Natural History. She is also executive director of Communitopia, a nonprofit focused on climate change communication, and holds many other roles in the community.

Family 2

Before...

Pets..

Health scares

Regrets?

I've already written one entry reflecting on how my family is doing without me and how I am doing without all of my family and friends. I've had to deal with a number of things that have happened at home.

Shortly before I left the United States, my grandfather faced a few health scares. By the time I left, everything had almost past, aside from some minor things. I knew there was a possibility that it could get worse while I was abroad, but I also knew that going abroad would not change any outcome.

Then, almost a month and a half ago, my family had to put one of our dogs to sleep. It was very sudden and everything happened in a few days. What made this more surprising is that our oldest dog is clearly showing his age and we all knew it was possible that I may not see him again, but our other dog is a little bit younger, but he always acts like a puppy so you would never know that he was ten years old. I even remember telling him that I didn’t have to worry about him because it seemed like he was in perfect health. Of course, I feel guilty about saying this, but there is no way I or anyone else could have known what was going to happen.

A few weeks before that, my dad broke his ankle and leg, and would be out of work for weeks. For me, the biggest impact this had was related to money, since my dad is the main bread winner in our family by a mile and it's not like we are rich or very comfortable to begin with. Now, today (Mother's Day in the U.S.), my mom called me because something else happened and my dad has been in critical condition all day and at this point, there is still a lot of uncertainty. It is harder to deal with since I am abroad, especially since a lot of people at SU have finished the semester and have been able to go home.

I think that all of this is plenty of reason to regret going abroad.....but I don't. Even though I lot has happened and is still happening, there is not much I could have done if I was home. More than likely, all of this would have still happened because stuff just happens in life. Don’t get me wrong, it is harder being abroad and being about from all of my friends and family but right now, I'm just reminding myself that stuff like this happens in life and often under the worst of circumstances (not that there is a best of circumstances).

Pyrosome passing through #ClearAPathPeople⁠

Pyrosomes are colonial tunicates made up of thousands of individuals known as zooids. Each zooid is housed in the common gelatinous tunic that makes up the larger cylindrical “body” of the pyrosome. Zooids filter phytoplankton through branchial baskets by creating feeding currents through the tunic. Although each zooid is only a couple of millimeters in size, pyrosomes can reach up to several meters in length. While alive, these organisms spend the majority of their time in the upper water column, but their remains have been found as deep as 4,000 meters (13,120 feet), where they provide food for a variety of deep-sea animals. ⁠ ⁠

Pyrosomes are bioluminescent, producing brilliant blue-green light. Each zooid can detect light and emit light in response, creating waves of bioluminescence up and down the organism’s body. The bioluminescence of one pyrosome can trigger others in surrounding waters, producing beautiful light shows. The name Pyrosoma comes from the Greek term meaning “fire body.”

Preparing to return home

Mixed Feelings  

Looking forward

Experiences

I can’t believe that in less than two days, my semester abroad will be over and I’ll be headed back to the United States. At this point, there are things that I miss about the U.S. and I am looking forward to go back, but on the other hand, there are also things that I do not miss. Likewise, there are lots of things that I will miss about Costa Rica (food, host family, etc..) but there are also other things that I am ready to leave behind.  

I’m in the middle of my finals week and past the worst part. I’ve been ready to be done with classes for a while, especially after seeing friends from home finishing the semester a month ago. I am also ready to start my REU (like an internship for science students) that I have been figuring out the logistics of since mid-March. However, this means that I will be home for less than 24 hours before I leave (I live in South Central Pennsylvania and my REU is in Rhode Island), which means that I have barely any time to spend with my family and pets.  

I’ve had so many experiences abroad that I don’t even know where to begin to articulate them to family and friends. And you can only understand some of them if you were here to experience them for yourself. Throughout, I’ve gotten more comfortable with public transportation, which barely exists at home, and is one thing that I will miss but will be difficult to convey to my family since if we want to go somewhere at home, we just drive there ourselves. While it’s more convenient, it is also so nice to know that if you do a bit a research, you can get to just about anywhere in Costa Rica by bus. I’m also much more comfortable with Spanish after spending a little more than four months here.

In sum, I will miss Costa Rica and hope that I can come back in the not so distant future. I will miss my host family and friends.

Bioluminescent Dinoflagellates

(source)

Untitled by artan