Technologies

California Wine Ruined by Wildfires Leads Chemists to Analyze Grapes for Smoke

«This research is highly valuable, with the potential to save countless dollars, and is increasingly relevant in our world of drought and climate change.»

The year 2020 left winemakers heartbroken.

As deadly wildfires on the US West Coast ripped through homes and tore apart forests, smoke seeped into world-renowned vineyards in California’s Napa Valley.

Precious grapes, lovingly nurtured in the name of beautiful wine, were ruined by the taste of fumes and grief. But winemakers continued their craft, hoping their grapes were among the few left unscathed. Most vintners weren’t so lucky. Their products were permeated by an acrid flavor, referred to as smoke taint. Wine once meant to go for $100 a bottle could now only be added to blends selling for $5 a gallon.

Looking to avert this sort of catastrophe in the future, especially as the climate crisis exacerbates wildfire rates even further, scientists are studying a clearcut way to chemically analyze which grapes and wines are subject to smoke taint and which aren’t. They published their outline this month in the Journal of Natural Products.

«What I discovered was that proper analytical data was not provided to figure out if the grapes or wines were affected by the smoke,» Phillip Crews, a chemist at UC Santa Cruz and winemaker at Pelican Ranch Winery, said in a statement. Smoke taint was first brought to Crews’ attention in 2018 as a result of the Mendocino Complex Fire aftermath, when wineries began rejecting ruined grapes from the region.

Without such a metric, post-wildfire winemaking and selling calls for a hefty amount of guesswork, like with the 2020 harvest. Thus, tainted grapes are often accidentally turned into wine that then gets rejected, leading to lost product, or tainted wine is sometimes sold under the guise of a good quality offering, resulting in lost reputation.

Basically, Crews and fellow researchers meticulously studied more than 200 grape and wine samples from 21 grape-growing regions in California and Oregon, each exposed to varying levels of smoke. They uncovered several «biomarkers,» or compounds present in the fruit or alcohol, that indicate the item is smoke tainted.

«There are still major gaps in our understanding of these compounds, so more research is needed,» Crews said. «But people can use these procedures now to look at a bottle of wine or a batch of grapes and tell if it’s likely to be affected by smoke taint.»

Searching for spoiled grapes

Right now most available research into smoke taint, per the study, focuses on smoke-derived compounds called volatile phenols.

These molecules are present in fumes from burning vegetation, such as trees during wildfires. Ripening grape skin can absorb these compounds, which is why it makes sense to check out grapes for these phenols — if they’re there, you’d think it’s safe to say the grapes are smoke tainted.

But Crews says identifying only the phenols doesn’t offer a full picture of smoke taintedness. There’s a caveat. Once inside grapes, the phenols bind to sugars and form totally new structures known as phenolic diglycosides that leave the smoke taint undetectable. That’s why it’s so hard to tell which grapes are affected and which aren’t. However, as soon as compromised products hit certain enzymes, such as those present in our saliva, the unwanted taint is released.

«We found that the phenolic diglycosides are stable in cabernet sauvignon during bottle aging, but then, during tasting, the monomers that smell bad get released in the mouth,» Crews said.

This is why Crews says scientists must measure the phenolic diglycosides directly, instead of relying on the ever-changing volatile phenols. That way, the smoke taintedness can be definitively detected prior to tasting. Through sophisticated chemistry methods, such as quantitative mass spectrometry, the study researchers pinpointed several biomarkers associated with phenolic diglycosides in their samples of grapes and wine.

«This research is highly valuable, with the potential to save countless dollars, and is increasingly relevant in our world of drought and climate change,» Eleni Papadakis, a winemaking consultant in Portland, Oregon, who wasn’t directly involved in the study, said in a statement.

She added, «I believe I speak for the whole of the winemaking community when I express the excitement and appreciation for the strong data and evidence-based guidance Professor Crews and his team have provided with this groundbreaking work.»

Technologies

Nintendo Switch 2 vs. Switch 1: Every Detail Compared

The Nintendo Switch 2’s official specs aren’t too different, but the new console has a lot of upgrades on the original Switch.

The Nintendo Switch 2 may look like its predecessor, but there’s been a lot of changes to its features and under the hood. The new console has «10x the graphics performance» compared to the original Switch, says Nvidia, which built the custom processor powering the Switch 2.

The Switch 2, with a release date on June 5, is priced at $450 alone or $500 in a bundle with Mario Kart World, the headliner of the console’s launch games. Here’s all the info on how to preorder the Switch 2.

Note that we’re mostly comparing the Switch 2 to the original Switch 1 released in March 2017, because looping in the Switch Lite and Switch OLED gets complicated.

Design

Broadly, the Switch 2 is a larger version of its predecessor, with everything looking slightly inflated: bigger footprint, bigger screen, bigger Joy-Cons.

Original Switch: The original Switch, with Joy-Cons slotted into the side rails, is a little over 9.4 inches wide, 4 inches tall, a little over half an inch thick and weighs about 10.5 ounces (297 grams). The Joy-Cons slide into place from the top of the device’s sides, while a thin wedge of plastic pops out of the back of the console to serve as a kickstand.

The Switch also came with a dock, which the console could slot into to for recharging and outputting to a TV or large display via HDMI port.

Switch 2: The new Switch 2 is bigger in every way, but it has the same overall shape and layout as the original. The new Joy-Cons will indeed be held in place on the console magnetically, and connect to the console via pins. The new console also sports a wide U-shaped kickstand that spans almost its entire rear width, which can be moved around to prop up the Switch 2 at a variety of angles. Nintendo says the console has more powerful speakers, which we’re looking forward to testing.

The Switch 2’s dock is largely similar in function though it has rounded edges and an internal fan to cool down the console during long game sessions. More importantly, it can output games in 4K to TVs, but only for select games.

Joy-Cons

The Joy-Cons were a marvel when they arrived on the first Switch, and while they’re functionally similar in its successor, there have been upgrades in the Switch 2’s controllers.

Original Switch: The Switch Joy-Cons are simple but powerful controllers that slid on and off the console via plastic rails, connecting and recharging via pins on the side. Detach and they become their own micro-controllers, with little shoulder buttons to boot.

Switch 2: The new console’s Joy-Cons are larger to fit the Switch 2, and lock into the side of the console via powerful magnets — there are small inward-facing buttons to the side of ZR and ZL to detach the controllers from the console. The larger-size Joy-Cons have longer L and R outside shoulder buttons, as well as much wider SL and SR internal shoulder buttons, which are accessible when detached from the console.

And yes, you can use the Switch 2 Joy-Cons as mice by placing their inner edges flat on a surface. During the Nintendo Direct, we saw it being used to control active action games like the wheelchair basketball-simulating DragXDrive and strategy games like Civilization VII.

Display size

Original Switch: The original Switch has a 6.2-inch LCD screen with 1,280×720-pixel resolution, which was reasonably impressive at launch in 2017 but has been outclassed by newer handhelds with sharper displays. The Switch OLED upgraded this with a larger 7-inch display showing deeper blacks and colors, but no upgrade in resolution. The Switch Lite has a 5.5-inch LCD screen.

Switch 2: Unsurprisingly, the Switch 2’s larger size means a larger display. The new console has a 7.9-inch 1080p LCD screen that can get up to 120Hz refresh rate in handheld mode, or up to 4K when docked and outputting to a TV.

Why no OLED display? Possibly to save on costs… or possibly to give Nintendo room to release a Switch 2 OLED version down the line.

CPU/GPU

Original Switch: The original Switch runs on an Nvidia custom Tegra X1 processor split into four ARM Cortex A57 CPU cores, and according to Hackaday, there are four extra A53 cores that aren’t used.

Switch 2: Once again, Nintendo hasn’t released any official info on the Switch 2’s specs, even after the Nintendo Direct reveal stream — and they most the company reveals is that it has a «custom processor made by Nvidia» on the Switch 2’s official specs page. Nvidia confirmed it also has a custom GPU, claiming that the new console has «10x the graphics performance» of the Switch 1, and the custom processor’s AI-powered features include Deep Learning Super Sampling (DLSS), face tracking and background removal for video chat and real-time ray tracing.

We do still have more supposed details from previous leaks. Months ago on X (formerly Twitter), leaker Zuby_Tech posted that the Switch 2’s CPU will be an eight-core Arm Cortex A78C. They also suggested that the GPU will be an Nvidia T239 Ampere, aligning with years of similar rumors reported on by Eurogamer and others about the custom chip, which derives from Nvidia’s Tegra line of chips for smartphones and mobile devices.

RAM and storage

Original Switch. The Switch has 4GB of LPDDR4 RAM and 32GB of onboard storage, expandable up to 2TB via microSD cards in the slot beneath the kickstand.

Switch 2: Even after the reveal stream, Nintendo didn’t release official specs for RAM. Leaker Zuby_Tech posted on X back in September suggesting the Switch 2 will have 12GB of LPDDR5 RAM and 256GB of onboard storage. That leak also suggested the new console will have two internal fans, up from the single one in the original Switch.

Nintendo did confirm that the new console will have 256GB of onboard storage, which can be expanded with special microSD Express cards — sorry, your old Switch-compatible microSD cards won’t work on the Switch 2.

Battery life

Original Switch: The original Switch packs a 4,310-mAh battery, which gives between 4.5 and 9 hours of battery life depending on screen brightness and other factors.

Switch 2: Though Nintendo didn’t release details on the Switch 2’s capacity in the reveal stream, the company does list specs on its website, showing it packs a 5,220mAh battery. While that’s notably larger than the one in its predecessor, Nintendo estimates this will only get players between an estimated 2 and 6.5 hours, depending on games played.

Ports

Original Switch: The first Switch sports a single USB-C port out the bottom, a 3.5mm headphone jack on the top and Wi-Fi 5 plus Bluetooth 4.1 connectivity. On the top is a slot at the top for Switch game cartridges as well as the microSD slot beneath the kickstand on the rear of the console.

Switch 2: The Switch 2 retains the original’s USB-C port on the bottom and 3.5mm jack on the top while adding another USB-C port topside, and now we know what it’s for: to connect with accessories like the Nintendo Switch Camera, a webcam-like camera on a stand to let you do Nintendo’s version of FaceTiming while you play games with your friends.

Nintendo hasn’t clarified the console’s connectivity options, and rumors are scarce on the subject.

As for cartridges, Switch 2 will play some original Switch games in physical versions. The cartridge slot is to the right of the headphone jack in the above image, which is where the slot is on the original Switch. You can tell game cartridges from the two console generations apart by color: ones for the new Switch 2 are red, while older Switch 1 games are black.