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Joseph D. Ortiz
@earthsciinfo.bsky.social
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The future of construction will be electric 🧪🔌💡electrek.co/2024/06/04/volvo-ce-expands-its-electric-construction-vehicle-line-up/
0 replies 2 reposts 10 likes
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Joseph D. Ortiz@earthsciinfo.bsky.social |
645 followers 369 following 709 posts
Oceanographer, Climate Scientist; Environmental Remote Sensing; Energy and Sustainability; Professor, husband, father #FirstGen Views my own; Google scholar: ions?user=qMBuSe4AAAAJ&hl=en&oi=ao'>scholar.google.com/citations?user=qMBuSe4AAAAJ&hl=en&oi=ao
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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The future of construction will be electric 🧪🔌💡electrek.co/2024/06/04/volvo-ce-expands-its-electric-construction-vehicle-line-up/
0 replies 2 reposts 10 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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What's the difference in energy use between a 200-400% efficient heat pump and a 97% efficient gas furnace with gas BTUs converted to kWh? Here's a graphical representation. The gas heater provided 2% of the heating runtime this past winter but consumed 12.5% of the total heating energy. 🧪🔌💡
0 replies 1 reposts 5 likes
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Richard Waite
@waiterich.bsky.social
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Re-upping this excellent article by WRI colleagues on increasing competition for crops—not only to feed people directly but also to feed animals and cars (biofuels). Did you know that since the 1960s, the share of global cropland used for domestic food consumption has declined from ~50% to 37%? 🧪
3 replies 26 reposts 49 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Vote for what you want. Lots of advantages to shifting to renewables, including lower operating costs, climate, environmental and health benefits. 🧪🔌💡
0 replies 11 reposts 22 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Yes. You get this but for others, what I like about @davidosmond.bsky.social simulation is that it incorporates a mix of renewables and storage to address the VRE issue. By mixing renewables you minimize storage needs as they peak at different times of day/year. 🧪🔌💡
0 replies 1 reposts 7 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Just posted about the rise of PV power. Here’s a near real time simulation showing it happening in Australia and how mixed renewables are helpful. Note the modest storage requirements. 🧪🔌💡
0 replies 4 reposts 5 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Thermoregulation for the win!
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Key statement from the Nature study: “The self-limiting effect of solar PV diffusion due to intermittency can be overcome with a policy mix supporting wind power and other zero-carbon energy sources, as well as improved storage, grid connections and demand-response.”🧪🔌💡
0 replies 2 reposts 6 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Key statement from the study: “The self-limiting effect of solar PV diffusion due to intermittency can be overcome with a policy mix supporting wind power and other zero-carbon energy sources, as well as improved storage, grid connections and demand-response. “ 🧪🔌💡
0 replies 0 reposts 2 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Preliminary obs. on Vaal Dam: this year has been drier than last year. At almost every site, we’ve seen a mix of Cyanobacteria, green algae, diatoms, and cryptophytes based on the Fluoroprobe. This differs from last year when one group or another dominated in different parts of Vaal Dam 🧪
0 replies 0 reposts 8 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Alt text for image in OP: the sun rises from the east over the glittering waters of Vaal Dam 🧪
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Last day of field work on Vaal Dam. We’re transiting to the east to collect data at our last stations. #NatGeo @ksuearthsci.bsky.social
1 replies 1 reposts 3 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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It’s a windy day on Vaal Dam. We’re starting to see Langmuir cells develop. These are spiraling water motions the form perpendicular to the wind wave crest. The strands of bubbles indicate converging motion at the surface. They set up after a few hours of wind.
1 replies 0 reposts 4 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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That is worth pointing out. But I have seen Cyanobacterial scum layers on the surface of Lake Erie that were 11cm thick!😱
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Most of the sites we have sampled have a mix of algae with pigment concentration of 40-60 ug/L Chl a by algae division. But on the transit back to the dock last evening we encountered a Cyanobacterial bloom. Our Fluoroprobe picked up >600 ug/L Chl a. #NatGeo 🧪
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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For reference, blooms in Maumee Bay and Sandusky Bay in Lake Erie have Secchi depths of 20-30 cm. But off Detroit the Secchi depth are as much as 200 to 300 cm. The depth depends on not only algae but also sediment and pigment degradation products (CDOM) 🧪
1 replies 0 reposts 11 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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The simplest tool we use for water quality monitoring is the Secchi disk. The disk is lowered through the water until it cannot be seen. Then you measure the distance. This provides a reproducible measure of transparency. Our Secchi measurements are around 30 to 60cm. 🧪
1 replies 4 reposts 16 likes
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Jan Rosenow
@janrosenow.bsky.social
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How the Nordics became world leaders in heat pumps and saw carbon emissions from heating drop dramatically.
My article for @CarbonBrief has the details 👇
www.carbonbrief.org/guest-post-h...
0 replies 6 reposts 16 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Vaal Dam experiences large seasonal changes in water level. This is the normal low level. The house is built to accommodate the natural seasonal range. But you are correct that climate change may increase the amplitude of the seasonal cycle. www.scielo.org.za/scielo.php?s...
1 replies 0 reposts 1 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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And for the one being captured it’s also not anywhere close to 100%.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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My first days as Chair of the Kent State Dept of Earth Sciences @ksuearthsci.bsky.social are spent doing field work in South Africa in collaboration with #WittsUniv and college of Charleston. Our faculty study around the globe. Come join us!
0 replies 0 reposts 8 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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This year we are seeing a mix of algae in Vaal Dam. At this location, the Cyanobacteria dominate, but not at bloom levels. 🧪 #NatGeo #fieldwork @ksuearthsci.bsky.social
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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The wind has picked up here in Vaal Dam, making for a chilly morning for #fieldwork #NatGeo 🧪
0 replies 0 reposts 6 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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My colleagues also have a spectroradiometer with a broader spectral range and a multi parameter sonde to monitor hydrographic properties of the water. We are also collecting water samples for lab analysis of algal pigments, cell counts, nutrients and Cyanobacterial toxins. 🧪
0 replies 0 reposts 1 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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The second sensor for my field work is this multichannel fluorometer. It uses lasers as different wavelengths to excite a fluorescent response from algae and decaying plant matter in the water column. It also has a transmissometer to measure particle conc.
1 replies 1 reposts 2 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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One of the sensors for my field work is a spectroradiometer. We measure the light reflected from the water surface to quantify lake color. Analysis of the spectra lets us determine the amount & type of algae, suspended sediment & pigment degradation products 🧪 #NatGeo @ksuearthsci.bsky.social
0 replies 0 reposts 6 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Alt text for the image in the OP: a view of a costal home in Vaal Dam in 2024. Water levels have dropped by 50% to conditions more typical of the dry winter season.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Here’s the same house last year viewing from a different angle (looking towards Vaal Dam). Note the position of the water relative to the horizontal beams connecting the stilts.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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I am in South Africa conducting water quality field work with funding from #NatGeo in collaboration with #WitsUniv and #CofC. Water levels this year have dropped by 50% from last year due to lack of rain. But we’ve not seen any HABs yet. @ksuearthsci.bsky.social 🧪
3 replies 3 reposts 7 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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From an operational standpoint, hydrogen will always be 3x to 5x more expensive than BEV. There is less energy in the hydrogen bond than the bonds of the water from which it is generated. And then you still need to compress and transport the gas.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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The limitations are policy based, not science based. The U.S. provides much greater subsidies to road and air transportation.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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China operates high speed electric rail across its country, which is vast in size. This is not an insurmountable problem.
www.statista.com/topics/7534/...
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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The quote in opposition in the article specifically discussed short run lines, not long distances.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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The point of my OP was to show that progress is being made, not to imply the problem was solved. To see deployment at scale is going to take time. But the improvements in energy density from batteries are promising and worth noting.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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June heat pump update: Installing a cold-climate heat pump & switching to renewable electricity purchased over the grid has resulted in substantial reductions in emissions. Existing technology is good enough to chip away at emissions when deployed. 🧪🔌💡
0 replies 6 reposts 23 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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It’s not an all or nothing solution. If electrification can reduce emissions from short and mid range flights, that is still helpful. When BEVs were first introduced they had short range as well. Now there are many models with >300 miles (>482 km) range.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Note I had a typo in my OP. The correct unit is miles, not kilometers.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Agreed on replacing short and mid distance flights with high speed rail. But 1,800 miles is a long enough distance to cover most air travel flights, although significant development will be needed to get to large capacity. As I stated, this is an existing gap.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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For ref. I serve on the NTRB AV030 aviation’s & the Env. The National Transportation Research Board of the National Academies is studying the issue of airport readiness for electrification. The FAA and other bodies are working on electrification of flight. nap.nationalacademies.org/catalog/2651...
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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I agree with you on AI and blockchain. But we will see on electric aviation. There are multiple aeronautics firms working on this technology. The fact that NASA scrapped a single project does not mean that none can succeed.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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In fact, there appear to be many in the global business community that do in fact envision a large and growing market for electric aircraft. www.statista.com/statistics/1...
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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All very true! And electric trains (battery or powered) will bring cost of operation down as well. “Hard to abate sector” is code for “I have stranded assets I want to keep using.” 🧪🔌💡
1 replies 2 reposts 12 likes
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Katharine Hayhoe
@katharinehayhoe.com
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Hurricane Beryl is already a dangerous category 4.
As climate changes, hurricanes are intensifying faster and becoming stronger and more dangerous … and this years season is just ramping up.
More on how to prepare and stay safe (read down): www.talkingclimate.ca/p/more-green...
4 replies 45 reposts 97 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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This is one of the reasons we need to stop burning fossil fuels.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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An important gap in electrified technology is long distance air travel. But specific energy density (Wh/kg) of batteries continues to climb. CATL announces they will have 8-ton, commercial BEV aircraft with range of 1,200 to 1,800 km by 2027 or 2028. 🧪🔌💡 electrek.co/2024/06/25/c...
2 replies 8 reposts 21 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Electrification is also coming to bus fleets around the world. Is your area lagging? 🧪🔌💡
1 replies 8 reposts 21 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Yes. That's why I mentioned eBikes too.
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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But in the US, there's a different perspective. Yet physics works the same here as it does in other parts of the world. www.newsweek.com/californias-...
3 replies 3 reposts 7 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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The Railway Industry Association (RIA) in the UK supports the effort. www.railmagazine.com/news/2024/05...
0 replies 0 reposts 7 likes
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Joseph D. Ortiz
@earthsciinfo.bsky.social
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Germany and the UK shifting from diesel-electric to electric trains. 🧪🔌💡 railuk.com/electrificat...
6 replies 40 reposts 114 likes