Delaware
Conservationists cheer a decision to save female horseshoe crabs from next year’s harvest
The Delaware Audubon Society’s Cottrell helps using man-made horseshoe crab blood, which has been developed instead for harvesting horseshoe crabs for biomedical functions. Nonetheless, its use has not been thought of within the U.S.
“One of many targets of environmental teams transferring ahead is to attempt to put strain on these teams which might be resisting the conversion,” he mentioned. “There’s going to be a battle, as a result of this business is well-financed. They’ve lobbyists who’re influential.”
A a lot debated change to calculating horseshoe crab harvests
Larry Niles, a biologist previously with New Jersey’s Fish and Wildlife division, mentioned he’s happy females gained’t be included in subsequent 12 months’s industrial harvest. Nonetheless, he opposes the fee’s choice to undertake the brand new framework. Niles and different opponents imagine it makes use of knowledge factors that don’t paint a full image of horseshoe crab well being, and overestimates populations of crabs and crimson knots.
ASMFC studies that Delaware Bay horseshoe crab populations have steadily elevated to 21.9 million males and 9.4 million females. Nonetheless, Niles argues that egg density is a extra vital determine. He and his colleagues on the Delaware Bay Shorebird Venture discovered that horseshoe crab egg density within the Delaware Bay was about 7,000 eggs per sq. meter in Could 2022. By comparability, eggs reached practically 50,000 per sq. meter within the Nineties.
“Egg densities haven’t improved because the time that this company began managing crabs,” Niles mentioned, including that “there’s as many crabs dying as are coming into the inhabitants.”
The Venture studies crimson knots remained at traditionally low ranges in 2022. Although numbers elevated from 6,800 in 2021 to greater than 12,000 this 12 months, it’s lower than half the 2019 peak depend of 30,000 — and a fraction of the height inhabitants of greater than 94,000 in 1989. The U.S. Geological Survey estimates that 40,000 to 50,000 crimson knots cease and feed every spring alongside the Delaware Bay.
However Niles argues that the survey is flawed. He says that’s an overcount as a result of it consists of birds flying overhead which might be searching for meals that they could by no means discover — somewhat than solely birds that cease on the shore to eat and efficiently make their technique to the Arctic to breed.
Proponents of the brand new framework say it’s extra correct than the earlier one, partly as a result of it’s based mostly on empirical knowledge collected instantly from the Delaware Bay. Within the earlier framework, a lot info used to formulate the inhabitants mannequin for horseshoe crabs was from Nice Bay, Mass., as a result of Delaware Bay info wasn’t out there.
The brand new framework additionally consists of new mortality knowledge, together with horseshoe crabs that die after being bled and launched for biomedical functions, and deaths attributable to catch in different fisheries. That gives a greater estimate of the variety of crabs within the inhabitants, proponents argue.
One other concern in regards to the former framework is that if horseshoe crab and crimson knot populations reached a sure threshold, the harvesting quota for females would mechanically soar from zero to 210,000. Underneath the brand new methodology, quotas will enhance step by step if feminine horseshoe crab abundance continues to extend.
The U.S. Fish and Wildlife Service has endorsed the mannequin, arguing that it makes use of probably the most superior knowledge.
“It does replicate the perfect out there science out there to us at present,” mentioned Rick Jacobson, the Service’s assistant regional director for fish and aquatic conservation, following Thursday’s vote.
Nonetheless, he added that with a view to achieve the general public’s confidence, it’s vital for the ASMFC to supply extra transparency.
“We’re gratified that the fee opted to forestall the harvest of feminine horseshoe crabs … by forestalling a feminine horseshoe crab harvest for 2023, it can give the general public further alternative to discover that mannequin to develop a better confidence in it,” Jacobson mentioned.
Delaware
Northern lights forecast: Auroras may be visible across US. Will you see them in Delaware?
Aurora Borealis appears over northern US
The aurora borealis appeared in parts of the northern U.S on Thursday. Footage shows the colorful northern lights visible from Lewes, Delaware.
After filling up on turkey, stuffing and a couple of slices of pie, Mother Nature will have an aerial fireworks show for you Thursday and Friday night.
A solar storm is forecast to reach Earth and produce colorful northern lights in the Northern Hemisphere.
The phenomenon, also known as the aurora borealis, should be visible on Thanksgiving and Black Friday in parts of the northern United States, according to the National Oceanic and Atmospheric Administration.
The northern lights are courtesy of a coronal mass ejection hurtling toward Earth, which prompted NOAA’s Space Weather Prediction Center to issue a geomagnetic storm watch for Thursday and Friday. The forecast storm won’t quite have the oomph of the G4-level whopper that came along Oct. 10, but it should still unveil the auroras across the Northern Hemisphere.
Here’s what to know about the northern lights and how to see them on Thanksgiving night in the U.S.
Northern lights: Amid solar maximum, auroras should be more visible across the U.S.
Where will the auroras be visible?
The auroras are best seen around the magnetic poles of the Northern and Southern hemispheres in Europe, Asia and North America. In the U.S., Alaska is well known to have the best viewing opportunities for the northern lights.
The auroras may become visible in some northern and upper Midwest states from New York to Idaho, according to the Space Weather Prediction Center’s experimental Aurora view line. The visibility for viewing also will depend on local weather conditions and city lights.
The northern lights may also be visible low on the horizon in several cities, according to the University of Alaska at Fairbanks Geophysical Institute website, which tracks the phenomenon.
Those include:
- Boise, Idaho
- Cheyenne, Wyoming
- Lincoln, Nebraska
- Indianapolis
- Annapolis, Maryland
Will the northern lights be visible in Delaware?
While the auroras will be visible as far south as Annapolis, folks in Delaware may have issues seeing anything Thursday night. The National Weather Service forecast is calling for a 100% chance of rain Thursday, mostly before noon. While the rain will move off, the forecast for Thursday night is calling for partly cloudy skies which could hinder visibility.
The best chance to see the northern lights is Friday. The forecast is calling for mostly clear skies. You will want to bring a jacket as lows are expected to drop into the upper 20s.
When is the best time to see the northern lights?
As a rule of thumb, if the weather is clear, the best aurora is usually visible within an hour or two of midnight, according to NOAA. And if it looks as if the northern lights will flare up near you, you should get away from cities and travel to dark locations free from light pollution so you can best see them.
The agency also maintains an aurora dashboard that should help skygazers track the phenomenon.
What causes the northern lights
The auroras are a natural light display in Earth’s sky. The phenomenon is caused when electrically charged particles from space enter Earth’s atmosphere and collide with molecules and gases like oxygen and nitrogen, causing the atmospheric particles to gain energy. To return to their normal state, the particles release that energy in the form of light, according to the University of Alaska at Fairbanks.
As auroras form, Earth’s magnetic field redirects the particles toward the poles through a process that produces a stunning display of rays, spirals and flickers that have fascinated humans for millennia.
Why northern lights activity is increasing
Now that the sun is at the height of its 11-year cycle, the increase in solar activity has more frequently fueled “space weather” that produces the right conditions for northern lights to flourish.
Regions of intense magnetic activity known as sunspots are proliferating on the solar surface and are capable of releasing intense bursts of radiation resulting in solar flares that can hurtle toward Earth at the speed of light, according to NOAA. Some of the flares can be accompanied by coronal mass ejections, or clouds of plasma and charged particles, that emerge from the sun’s outermost atmosphere, the corona.
These ejections can collide with Earth’s magnetosphere, the barrier protecting humanity from the harshest effects of space weather, to produce geomagnetic storms that unleash spectacular views of the northern lights in parts of the country where auroras are not often visible.
What’s more, because NASA expects the solar maximum to continue into 2025, aurora chasers should have plenty more opportunities to catch the northern lights.
Delaware
Work has begun to restore eroded shoreline north of Delaware Indian River Inlet
This story is part of the WHYY News Climate Desk, bringing you news and solutions for our changing region.
From the Poconos to the Jersey Shore to the mouth of the Delaware Bay, what do you want to know about climate change? What would you like us to cover? Get in touch.
An emergency dredging project to restore severe beach erosion along a popular surfing and fishing spot north of Delaware’s Indian River Inlet began this week.
The $15 million initiative aims to restore the shoreline on the north side of the Indian River Inlet Bridge.
Two separate storms earlier this year triggered dune breaches along the coastline, closing portions of the Coastal Highway.
The project is a crucial step to protect the highway, which serves as an emergency evacuation route, according to Delaware’s Department of Natural Resources and Environmental Control.
The project will also prepare the area for the increasing intensity of storms caused by climate change, said the agency’s secretary, Shawn Garvin.
“[The area] is in a position where it tends to lose sand faster than other areas of the coastline, and does not naturally regenerate,” Garvin said. “It is at the foot of the bridge. It is a very popular area for fishing and surfing, and general beach use. So, we’re looking to try to get it back into a stable situation.”
Delaware
East Coast Has a New Drought Worry
Salty ocean water is creeping up the Delaware River, the source for much of the drinking water for Philadelphians and millions of others, brought on by drought conditions and sea level rise, and prompting officials to tap reservoirs to push the unpotable tide back downstream. Officials say drinking water isn’t imminently at risk yet, but they’re monitoring the effects of the drought on the river and studying options for the future in case further droughts sap the area, per the AP.
- What is the salt front? The salt front, or salt line, is where salt water from the ocean and fresh water meet in the river. That boundary is typically somewhere around Wilmington, Delaware, but the recent drought has pushed it about 20 miles north.
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